Burn - an OSS alternative to Toast:
"Toast is great, and Mac OS X can handle burning a few types of CDs and disk images natively, but what if you need something in between Toast's $80 price tag and Mac OS X's basic burning abilities? Burn might just be the answer you need. This open source app can handle CDs, DVDs, VCDs, various data disk types, disk images and more"
(Via The Unofficial Apple Weblog (TUAW).)
Cool, I'd been looking for an open source CD/DVD burning program. I'll try it out this weekend.