If you have one of those mobiles that don’t yet accept mp3s as ringtones, but already accept MIDI (hint: SonyEricsson P800), you’ll be interested in good quality, full length MIDI collections. I came across one such – MIDI Database. It provides a whole bunch of songs by a whole bunch of bands in a whole bunch of music genres and all for free. There are also links to commercial MIDIs in case you need some particular song. Good resources overall. Might be also interesting for keyboard musicians.