Classical and Flamenco Guitar MIDIs: 20 Studies by Fernando Sor (arranged by Ray Izumi), the famous 25 Studies by Carcassi (arranged by John Chiu), and others.
Manitu's Place: Original guitar music wav and midi. Free guitar tuner for Windows 8K zip. Links.
Perso Flamenco: Classic: Links to 400+ MIDI files, many on the site.
SCK's Guitar Page: approx 70 classical guitar favourites, most of them arranged by Stephen Kreher (also Beatles xmas pop/rock sections)
Syukhtun Editions: Original music for classical guitar by Theo Radic'. Large selection of MIDI revordings of guitar music, and MP3 samples of CDs.