Online flv video converter

I want to get a site set up that will allow users to paste a link to the video (youtube, myspace, metacafe and collegehumor are my main focus) and the script download and convert to an output that the individual chooses. Then have it email them when its done and delete ofter x amount of days. I would like it to be able to convert to as many formats as possible. The closes example I can find is [login to view URL]