To be perfectly honest, I think that IDM (or whatever you'd like to call it) never sounds exactly the same artist to artist. The influences tend to switch and change depending on the person. Granted, as some people on this list have pointed out, there is a bit of cementing regarding sound (like with grunge, as someone else mentioned) between the glitch and melody camps, but I've noticed some artists in the genre who are pulling music from more interesting places than simply Warp, etc. So, I can't really agree that IDM has a hip hop connection in sound, but I would say that some IDM shares that same "collage" of sound that hip hop uses. Not to mention that hip hop is like updated jazz in a way--jazz artists often used popular songs as the basis for reinterpretation and new arrangement (kind of like sampling before the dj).
Anyways.
I just got Aspen's Sugar and Spice. Sounds pretty good. Think I'll go listen again.
cheers,
Mark
hellothisisalex
www.hellothisisalex.com / records.hellothisisalex.com
mp3s at www.raw42.com/cgi-bin/featuredartist.pl?artist=213
mark@hellothisisalex