Any love around here for GoGo Penguin?
If you like Jazz-based music of this type I can think of no better act than this British trio; they are the best I've heard at juxtaposing the appropriate "chill" vibe with Jazz improvisation and composition, so you get ambient music that swings, but not in the typical "Acid Jazz" or "Lounge Jazz" fashion. They have released a few albums at this point, all worthwhile!