I was always getting the wrong aspect ratio when using the "Movie to Ipod" setting in QTpro to convert 720x480 DV video. I finally found the answer, and I just loaded it onto my video Ipod just fine! Thank god... finally can use the superior H.264 over MPEG4. Anyway... here's the solution:
http://docs.info.apple.com/article.html?artnum=302955
http://docs.info.apple.com/article.html?artnum=302955