Screen output?

[imonandroid]

So I'm planning on getting a samsung captivate, and I'm curious if you can screen output to a computer monitor using some sort of app or using usb?

I know you can with the 3.5 mm jack, but i feel like with a computer it might be easier using usb or something?

I'm thinking for if you need to give a presentation (at school or work) it could be pretty easy if you just get it loaded up on your phone, plug it into the display unit (a computer screen or a projector) and play it straight from the phone.

thinking about it now i'm sure all the presentations i've seen have been with dlna capable monitors...

Thanks