I have posted that my render time with Vegas 7.0e for a feature-length SD-DV project dropped from 27 hours to 1 hour 5 minutes on a new quad Mac Pro running XP Pro SP2 on Boot Camp. One caveat: Last night I added my favorite effect from the Magic Bullet HD plugin in Vegas to all tracks for a final "look" for the film. Render time on that one is 5 hours 5 minutes.