[PIF]

add VGA:
http://www.tuaw.com/2010/04/09/real-life-ipad-presenting-with-an-ipad-keynote-and-vga-connec/

Add OSX:
iPhone uses a subset of OSX.

[TXnMA]

Video adapter? Who needs it? my Epson projector shows up on my MacBook Pro as just another WiFi node -- no connector, no wires...

Don't own an iPad, but can imagine the freedom to walk around while presenting would be quite enjoyable.

I suppose I could do so with the MacBook, but a 17" laptop (any brand) is not exactly "totable" when opened up for use...