Here is a really nice demo of 3 delay pedals by Vinyl Future (at myspace: http://www.myspace.com/vinylfuture).

The track uses the Boss DD-3, the Line 6 DL4 and the TC Electronic Nova Delay. The Boss DD-3 is is set to a  standard 1/4 note repeat while the TC Electronic Nova Delay is set to a reverse delay with modualtion.  Finally, the Line 6 DL4 is set to ‘Digital delay with modualtion’ with very high repeats.

Really nice ambient sound textures.  Don’t forget to check out his myspace page.