Apple's Compressor would work GREAT for this!! Import the one file you want different versions of, list the versions you want, press submit, and it does the rest. Although, I'm not sure off the top of my head if Compressor creates FLV files. Also, I'm with Mark when it comes to Vimeo. $59.95 for a year plus subscription, 5GB a week of upload, AND you would have your website (by embedding), your mobile availability (done automatically), and YouTube (if you replaced it with Vimeo) taken care of with one simple upload.