Last week I blogged about DownloadHelper and I really like it. Surfing around on YouTube tonight, I saw a comment that said you can save the audio from a YouTube video. How? vixy.net
You can either give it a url to a YouTube movie, or an url to a flv file and it'll transcode it to AVI for Windows (DivX + MP3), MOV for Mac (MPEG4 + MP3), MP4 for iPod/PSP (MPEG4 + AAC), 3GP for Mobile (MPEG4 + AAC), MP3 (audio only). I tested it out and it was surprisingly fast to transcode, but a little slow (80Kb/sec or so) to download, not that that's horrible. I'd assume the server is in Japan.
Anyway, try it out. Very cool.