You can use the (free) open source program Handbrake to do the conversion.
http://www.ioncannon.net/meta/1040/how-to-create-ipad-formatted-videos-using-handbrake-or-ffmpeg/ tells more.
Googling for HANDBRAKE IPAD CONVERT finds many more hits to help you.
Kees
I have some great DVDs and wanan enjoy on my ipad, i need to convert them to mov right? any easy way to do this? i need help in hurry.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic