I borrowed a friend's Sanyo Xacti to consider buying one as a 3rd camera to do wideshots in gigs along with our two higher-end cameras. But when I tried to bring the resulting MP4 files into the Vegas timeline, Vegas crashed every time. Tried it on two different computers (one dual-core desktop, one laptop), and the result was the same on both.
Anyone successfully integrated MP4 files with AVI files in projects in Vegas9?