In the UK, any copying of the original media for ANY reason is currently illegal. This includes MP3 ripping, DVD ripping, taping sky+ onto DVDs (to be watched more than once) and mix-tapes whether you still own the original DVD/CD or not. Of course, if it's for personal non-profit use you can be sure you won't get in any trouble.
The government commissioned a report a year or so ago and the results came back a few months ago advising that they make it legal, which they have promised to look into.
http://www.pm.gov.uk/output/Page10776.asp
http://www.macworld.co.uk/ipod-itunes/news...=allchandate%20
http://www.engadget.com/2006/05/12/bpi-may...s-right-to-rip/