Seeing as I proposed we move to .mp4 at the beginning of the year, I've been very happy with the quality of the move. I started off using visualHub (on my mac) to convert everything to .mp4, now i'm doing everything in Final Cut Pro and exporting in MPEG 4.
I had some issues this weekend recording when I moved away from movie maker on windows. On friday I was webcasting with my mac on Ustream, and recording on a desktop PC in movie maker. recording into .wmv is really easy with movie maker so I like using it, but i figured out later on that I could get a better quality stream with IE on the PC so switched to streaming onto the PC. This meant I had to record on the mac, which I really wasn't prepared for, I used quicktime recording in DV to my external HD but had issues with it and lost a couple matches. it seemed like if the recording was larger then 4 minutes it would crash, and it seems like the HD couldn't keep up with the data rate of the video or audio so there is some skipping. Luckily i used Ustream's recording capabilities and should be able to get most of the matches I lost.
Next year I'm going to invest in one of
these babies , I hear Joe Ross recorded LA with one of these and I'm very interested in hearing how it went, it looks like a really easy way to record right to h.264.