I could be wrong, but my guess is that the dock to VGA adapter will let you project whatever is on the screen, regardless of the app.
Kind of REALLY hoping that is the case - because then I could use my flashcard app in a group setting for trivia.
What stinks is that i could really use this next week..... but i'm also thinking that might be expecting wayyyyy too much right now too.
Back to pondering if the pico projector will work for my needs, and if I want to do it before the iPad comes out (i'm trying to see what i have that I could use with it on my Touch - which isn't working in the trivia game i'm messing with in keynote).