It seems technology has leapfrogged someone's business model yet again. I've been searching for ringtones for my Sony Ericsson T610, and came across the UK site PhunkyPhones.net. Their business model is typical — you preview songs on their site, and if you find one you like, you call their number and, for a small charge on your phone bill, they send you the song via MMS. Unfortunately for them, "polyphonic ringtones" are really just MIDI files, and their "previews" just link directly to the MIDI file. So, if you have phone which allows direct file transfer, well, just do a "Save As...", upload, and you've saved £1.50.

Whenever you base a business model on a minor arbitrary technological limitation (such as earlier phones' lack of direct upload capabilities), you are setting yourself up for eventual failure.