Ron Thal's 9/11 CD. Its pretty much all done with a fretless.
1. Fly's in the Batter is all fretless grinding metal rhythmn. And it goes on (its a real badass song). Its a quite a heavy song.
2. Lost has his harmonic slides in harmony for rhythmn, sounds awesome. With a 5/4 and 2/4 polyrhythmn (technically a syncopation) and other badass fretless rhythmn that sounds really chaotic and heavy
3. Ray Gun is pretty heavy, and awesome.
4. Hole in the Sky: Light and warm, and airy.
5. Children of Sierra Leone: Depressingly heavy fretless pwn.
6. Don Pardo Pimpwagon: Not any fretless playing
7. Legend of Van Cleef: Mostly fretted. Not sure.
8. Guitars Suck: Taking the piss out of the neoclassical "self-important and egotistical" thing, and its awesome. Finishes with a warm fretless solo, with the fretted part played in the background in harmony. Pretty neat to hear, imho.
Rest of the album is awesome, but all fretted. Except the ending chords to Time, I think those are fretless.
Fly in the Batter:
Just get 9/11, that CD blows my mind everytime I hear it!
Preview the songs on amazon:
Amazon.com: 9.11: Bumblefoot: Music