I discovered this site while browsing a few torrent sites for ambient, chilled out music.. This is about as ambient as you get and it's really well made. I'd recommend it to anyone who doesn't like in-your-face, aggresive music or even people who just want a break from that (like me)..
It's really beautiful, emotional music that's perfect for smoking to and maybe even for after parties and stuff..
Oh and it's all free!
Ambient Nights - ambient-nights.org
Edit: I'd start with Ambient Nights - The Chill Surrounding The Promise of Snow