1. will the USD do still frame w/ VITC in Pro Tools 4.0?
ANS:Yes (the DTP will not).

2. What is Bi phase?
ANS: Bi phase is an old sync technology used in the film industry. Typically it was derived from a box that hung off of a big mag reel. This box emitted a pulse that allowed sync. It probably will not be an important feature for the majority of our users.

3. Does the USD do DA88 sync?
ANS: Not at this time. But rumor has it that the upcoming version of Pro tools will have a sample accurate DA88 proprietary sync, probably through the AES/EBU ports!