Dolphin is both a Linux file browser and an Android web browser. The two projects are unrelated, save for both being named after the same marine mammal.

On android 4.x at least, the process is simpler.
From the home screen (or another app, if you forget). Hold home, if vibration is on it will vibrate twice. The task switcher will come up. Swipe an app's thumbnail right or left to kill it.
Most previous android phones could do pretty much the same thing, but IIRC it took an extra button press somewhere. It's been a while since I've run Froyo or Gingerbread on my Vibrant (same generation as your Evo).
Third-party roms are great.

Ubuntu lets you install multiple desktop environments at the same time and select them on login as well, just FYI.

Storage per GB, eh?

I currently use 675GB out of 1.25TB. (not counting backups, of course.) When I go over about 800GB total I tend to go through and delete unused data/programs. That's not to say I need all that storage on my desktop, I'd rather have it in a NAS with a hot spare, but that's a bit out of my budget.
My next PC will almost certainly use an SSD for OS and swap partitions, with a 1-2 TB HDD for bulk data. My laptop and phone can copy data to/from the desktop as needed.
Checking to see what all that space is: 200 GB Programs. Games and my tendency to lose original install media tend to be the big offenders. Steam helps.
70GB TV shows and movies not (yet) available on Netflix. Pretty much all stuff I've watched but know I will rewatch later, or want to show to someone else.
34GB Music
32GB Books, mostly zipped. Many have duplicates in various formats, due to old device restrictions. Could probably cut collection size in half by cleaning that.
5GB Documents
4GB Pictures.

Rabbit stew is delicious.

The DMCA takedown request can only require the host to takedown the infringing items. If the host takes down the whole site (like in this case) it's the host's fault, not the DMCA filer's fault.

Create second gmail account. Use aliases there. Have that forward to your primary account. You now have the same net effect as your second yahoo account, with the "base name" of the yahoo account's spam filtering replaced by the address of the secondary account.
Or use Spamgourmet, which is what Yahoo's system is based off of. Or Mailinator, dudmail, or any of the many, many other such free services.
My point was that a system exists to decoy spam in gmail, while ThunderBird89 seemed to think there was no such system.

And every user with a modicum of taste is thankful that gmail does not have that.

Yeah, use whatever works best for you. I made my post because it seemed you had some misconceptions about gmail, not to convince you to switch. With the way Yahoo! has been losing money I figured it might help to know how to get similar functionality out of gmail in case they go under.

Gmail aliases are unlimited. Not just 500. If you are more paranoid than average you can use a second address set to auto-forward as the base. That makes it take about as much setup as Yahoo's version.
Gmail has keyboard shortcuts.
Yahoo!'s storage space isn't unlimited, they just don't tell you the cap.
You can detach the "compose mail" dialog to a separate window. You can make as many windows as you wish (or until you window manager/browser crashes.)
If you only use one label per message then labels are identical to folders. Otherwise they have a strict superset of folder functionality (a message can have >1 label, but can only be in 1 folder.)

What, exactly, does Yahoo! have that Gmail doesn't have? Other! Than! Excessive! Punctuation!