FTA: "If you have a PIN or an unlock pattern set, all you have to do in order to bypass it is simply tap the lock button to wake the display and then let the screen time out and go black. Tap the lock button again and low and behold, the unlock screen is gone and the phone can be accessed with no PIN or pattern input whatsoever."
Just because you can't see the argument for a single bag doesn't mean that there isn't one. For example, when I recently traveled to Peru, I rarely let my backpack out of sight—I didn't random hostels enough to leave thousands of dollars of equipment there, nor did I have a vehicle. That said, I did very well with a single piece of luggage, the Calumet BP1500 Large Backpack. It fit my 13" Macbook Air (with plenty of room for a larger laptop), my DSLR with a couple lenses and requisite accessories, in addition to clothes and whatever else I needed to survive for 10 days. All with enough space to bring back souvenirs.
The simplicity of a single bag was a boon when cramming myself into a taxi colectivo for 2 hours with a dozen strangers. Honestly, I'm not sure there would have been room for extra luggage.
As for the author's request, most details can be found on the product page, but in my opinion, the best part of that bag was having a hip belt to take the admittedly heavy load off my shoulders while hiking.
You get what you pay for. If you want total control, man up and take it! Get a VPS from Linode or Slicehost and configure the server exactly how you want. They offer similar service for similar prices. To get you started, Linode has a LAMP StackScript available that can have you up and running in about 2 minutes. From there, configure Apache for multiple vhosts and you're all set.
The downside is that ultimately, yo're responsible. The upside is that they don't touch your stuff and are expandable nearly instantly
...because I outlined potential uses 5 days earlier.
Probably my favorite idea is a type of scavenger hunt with clues that are decoded from Free Text tags posted around the city. Find a tag, decode the clue, leading you to the next tag, etc.
The other great use would be integration of a tag into your address book, so that if you want to transfer your contact info, just let someone snap your vCard tag off your phone screen.
Happiness is twin floppies.
