PSVita supports multiple PSN Accounts per system, but only if you have multiple memory cards.

[theprof00]

hate away then.
I'm buying one because the battery life is good enough, the size is for that gigantic screen, and the game lineup is out of this world.
You buy a console for the games, not the battery life, and fortunately, I'm not away from my house playing psp for 3-4 hours in a given day.