Are there any DSLR cameras that offer video out to view what you're about to cap

Question:

Are there any DSLR cameras that offer video out to view what you're about to capture on an external screen?

Which will assist me with taking self portraits?

Best Answer - Chosen by Asker: I think the new canon 1DMIII does this. of course it's 4000 bux! Might be cheaper to hire a pro. or just take a bunch, and see which you like best.