What type of problems would I have mixing footage shot with a JVC HD-100 at 480 (hdv, sd 60p) and footage shot with a PD 150 (dv) and then edited with Sony Vegas 6? I've got a wedding tommorow and I'm itching to break in this JVC but I don't want to jepordize the wedding video. Help.

The problem you'l have is that you have two completely different frame rates, 60fps and 30fps. Also, how would vegas interpret fields? It might step print the 30i footage but then you'd get interlace artefacts.

can Vegas "interpret" clips the way After effects does, in which case it might treat fields as separate frames in the timeline, and can it play this back in real time. Anyway, how are you going to oputput the final footage, in SD NTSC? you then have to go from 60p to 30i.

There's also the fact that the 60p will be mpeg2 and the 30i would be DV. Can vegas mix them on the timeline (some NLEs can, some can't)

Keep it safe - shoot the whole thing 30i DV.

You can shoot 480/60i with an HD100U, if you desire.