For the last minute rumors... RandomAccess posted that an iTunes 3 reference was temporarily revealed on Apple's QT Streaming Server page:
The page promoting the new version may have also leaked the imminent release of a new version of iTunes. "Build a playlist of MP3 files," the page reads, "and serve them to MP3 clients such as iTunes 3..." (Update: as of this writing, the reference to iTune's version number has been removed.)