At Entertonement (I know, the name sounds like a old appliance, but that's the retro cool thing about it), we're building a rails app to upload and work with sound clips. You can add a clip - then we'll convert it - allow you to make a ring tone out of it, embed it in a blog, etc. Here's the first test of the javascript widget that we're making. Sorry - it'll probably break if you're not logged into our dev site.