Has anyone else tried www.zamzar.com. This has been working pretty good for me.

You can put a button on your browser toolbar. then when you're on YouTube and find something you want to convert just click the toolbar button. A screen comes up and asks you what type of file you want to convert to (mp3, avi, mpg, mp4, etc). You put in your e-mail address and it converts it and e-mails you the link. You have to open the e=mail and download from the link within 24 hours though.