Soooo...I thought I might have seriously had the first bricked Vita. I had tried connecting to my wireless hotspot while going to work (to see how Near is really supposed to work), but I tapped on what I guess was an empty space on the connection list instead of the hotspot. The Vita didn't like that and went to some black screen with two options - something about Network Operator and Cancel. And it stayed there - hard lock frozen because neither of those buttons responded to taps. Best of all, I couldn't turn it off.
The Vita ended up sitting in my car turned on, screen display and all (safely tucked away, mind you) for roughly 7 hours. It died shortly after I got home, so I figured this was the chance to recharge it and get it running again. After getting it charged to where the orange light went solid, I hit Power.
Nothing.
Tried holding it, pressing it several times, no good, still wouldn't come on. At this point I'm freaking out. Fortunately, I found out from the online user guide that the Vita has something I didn't expect - a safe mode. It's activated by holding power until the mode's menu comes on - I think it was around 20 seconds or so. It's so long that you couldn't do it by accident. I gave the first option a shot "Restart the Vita System" and there was life! I didn't lose any data, from the freeze and eventual shutdown either, thankfully.
So yeah - if you ever have problems getting it to start up, there's that. Just make sure it's got some charge and hold the power button down a really long time. There's options on that safe mode menu for upgrading the firmware, reformatting the memory card, and factory defaulting the Vita itself as well.