@transapp – great idea, that way you can have the film library for the kids anytime
I’m Mac based and use RipIt and Handbrake – it can mean a few steps to get the DVD into the format you want for iPhone and iPad but it’s easy to do. I have an external hard-drive with 100’s of GB’s of movies etc. Very useful to take around with you.
It’s perfectly legal to buy a second hand DVD, RipIt then sell the DVD on
FWIW I also buy content via iTunes, eg Strength in Numbers and All I Can
EDIT: I have a Seagate drive – just saw one online £35 for 500GB – if you start ripping movies you will fill up your hard drive and slow your machine down if you leave them on the main machine – suggest you get an external drive