The best 'virtual iPod'

Thanks to an anonymous tipster who was kind enough to post a comment here a few days ago, I've found the best "virtual iPod" site yet. MediaMaster allows unlimited storage of music files (at least for now, while it's in beta test stage) and then plays the songs on a music player that's built into the site. The site requires Flash, but it doesn't seem to be specific to any particular operating system; I've used it with a Windows XP computer, a Macintosh laptop and an old laptop running SAM Linux from a live CD. More about the site here, in a column I wrote for my old newspaper back in Oklahoma. My only fear is how much money will be charged for the site when the free beta test period ends.