I like Shpongle and to an extent IM as well (Heavyweight album only for me, plz), but to call it experimental electronic would be a misnomer IMO, or at least on over-generalization. The term bandied about for Shpongle is Psytrance, which is the red-headed stepchild of Trance and Psychedelic music. I'm not making it up, either. Sounds silly, but it's widely accepted so /shrug. You're not flat out wrong in calling it experimental or electronic though.
I dig it. I also recommend other Simon Posford projects (he's 1/2 of Shpongle) such as Celtic Cross and Hallucinogen. Easily Embarrassed is a bea-u-tiful ambient electronic group. You may also enjoy Androcell. Solar Fields. Let me know.