I'm guessing that it's a one time treatment.

Otherwise they would use an engineered virus to deliver the mutation to your entire body.

Obviously this is all unconfirmed at best. and I still have some serious doubts about the story,

Again, this is all just rumors and lies at this point

Okay, I need to get my facts straight. After doing some reading up on the topic (too late obviously) it is not clear to me that this guy's story was crap.

[...] I mounted, and as I lept off into the horizon, I casted levitate. I came to a point where the map disappeared, but the water continued to stretch out into the distance.
Some theorize that this is where GM Island is located.
Okay, so we all know that GM Island is in an instance now. But like any instance, there's a non-instance version of it. Like when you set old world instances to "Heroic" and walk behind the portals. GM Island wasn't always an instance, and programmers just don't delete environment from the game. Case in point, Old Ironforge and Ironforge Airport.
Granted, you'd have to walk pretty far, assuming GM Island IS in that direction...
Moving on, it's unreachable alone...attempted it. However, multiple priests together could do this easy. Have 5 or so in a group together so they can heal off of each other with renew and circle of healing. Another tip, wear +healing gear that has no stamina. Fatigue hits for 20% of your max health every 1-3 seconds. Low health means low damage, high healing means you can heal over it. 5 priests means you can have a few of them sit back and relax while the others cast, so not everyone wastes mana.
If you are really interested in doing this, make it 4 priests and a warlock.
"Harmonex wishes to summon you to GM Island." [...] Of course, this is all under the assumption that GM Island even exists on the main map...

There are also indications that early design work included some of the islands in this area,

from Drs. Erick Janssen and Stephanie Sanders, both of the Kinsey Institute.

As posted by Trent himself in response to Apple's rejection eMail:

...I'll voice the same issue I had with Wal-Mart years ago, which is a matter of consistency and hypocrisy. Wal-Mart went on a rampage years ago insisting all music they carry be censored of all profanity and "clean" versions be made for them to carry. Bands (including Nirvana) tripped over themselves editing out words, changing album art, etc to meet Wal-Mart's standards of decency - because Wal-Mart sells a lot of records. NIN refused, and you'll notice a pretty empty NIN section at any Wal-Mart. My reasoning was this: I can understand if you want the moral posturing of not having any "indecent" material for sale - but you could literally turn around 180 degrees from where the NIN record would be and purchase the film "Scarface" completely uncensored, or buy a copy of Grand Theft Auto where you can be rewarded for beating up prostitutes. How does that make sense? You can buy The Downward Fucking Spiral on iTunes, but you can't allow an iPhone app that may have a song with a bad word somewhere in it. Geez, what if someone in the forum in our app says FUCK or CUNT? I suppose that also falls into indecent material. Hey Apple, I just got some SPAM about fucking hot asian teens THROUGH YOUR MAIL PROGRAM. I just saw two guys having explicit anal sex right there in Safari! On my iPhone!

Come on Apple, think your policies through and for fuck's sake get your app approval scenario together.

Later in the threaded discussion, Trent clarifies his position with this little gem:

Everyone - let me be clear. I love Apple products and as goofy and out-of-touch as their app approval process / policy is, I will still use them because they work 1000X better than the competition. This is not a debate, it's a fact. The iPhone is THE most elegant, modern smartphone at this point in time and it's perfect for what we want to do with the NIN app - except for the ludicrous approval process, and that's what I want to draw attention to.

Android is cool, but nobody has an Android phone. Blackberry is OK but the hardware is inconsistent and WinMo straight-up sucks balls. If Apple doesn't get it together, we will most certainly make it available to the jailbreak community. I didn't invest in this app to see it languish on the sidelines from an idiotic policy while this tour is in full swing.

i disagree, with postal spam at least if they provide a pre-paid return envelope i have the satisfaction of putting everything they sent me in that envelope, along w/ a few rusty washers (to add weight), and maybe a sunday paper glossy ad or two (more weight, and thickness) and sending it back to them on their dime.

#127039 +(10530)- [X]
[wolf] 1. Save every Free Credit Card Offer you get, Put it in pile A
[wolf] 2. Save every Free Coupon You get, put that in pile B
[wolf] 3. Now open the credit card mail from pile A and find the Business Reply Mail Envelope.
[wolf] 4. Take the coupons from pile B and stuff them in the envelope you hold in your hand.
[wolf] 5. Drop the stuffed to the brim envelopes in your mail and walk away whistling.
[wolf] I have now received two phone calls from the credit card companies telling me that they received a stuffed envelope with coupons rather then my application. They informed me that it they are not pleased that they footed the bill for the crap I sent them. I reply with "It says Business Reply Mail" I'm suggesting coupons to you to ensure that your business is more successful. They promptly hang up on me.
[wolf] Now, I did this for about a month before it got boring, so I got an added idea! I added exactly 33 cents worth of pennies to the envelope so they paid EXTRA due to the weight. I got a call informing me about the money, I said it was a mistake and I demanded my change back. After yelling at the clerk and then to the supervisor they agreed to my demands and cut me a check for the money. I hold in my hand at this very moment a check from GTE Visa for exactly 33 cents.

The game was noted in IGN for its Phantasy Star Online-like multiplayer cooperative play, but the use of the Game Boy Advance, while innovative, was thought to be detrimental to the gameplay.