RIAA's old site: http://web.archive.org/web/20070516072606/http://www.riaa.com/issues/ask/default.asp#stand
"What is your stand on MP3?"
"...If you choose to take your own CDs and make copies for yourself on your computer or portable music player, that's great. It's your music and we want you to enjoy it at home, at work, in the car and on the jogging trail."
RIAA's new site: http://www.riaa.com/physicalpiracy.php?content_selector=piracy_online_the_law
"...burning a copy of CD onto a CD-R, or transferring a copy onto your computer hard drive or your portable music player, won't usually raise concerns so long as:
* The copy is made from an authorized original CD that you legitimately own
* The copy is just for your personal use. It's not a personal use - in fact, it's illegal - to give away the copy or lend it to others for copying."