Quicktime Pro is working for me.
doesnt' quicktime pro give you sync issues with the sound? at least that was the problem I was running into when I was converting .avi files last year to watch on my ipod
No it doesn't. So +1 to quicktime.
You could also use the new version of Handbrake.
any of those previously listed free?
Quicktime no. You will need to buy a license for the export option.
Handbrake however is free. It's a super app. You can rip DVD's straight to iPod format in just a few clicks. It comes with a load of presets for all the iPod types and many other portable video devices too.
You can find it here http://handbrake.fr/
Thanks for your help. I forgot to mention that I have a Mac.