I just got I'm Around About Midnight, and it is quite good. Very atmospheric, but not what I personally would call ambient - something like Tangerine Dream with guitars and more of a rock/space vibe. Very cool.
[I am listening to it right now to get a better feel for a recommendation. It really reminds me of something, but I can't put my finger on it. It is really good. Almost more psychedelic than prog. Has a Mike Oldfield vibe, too. I also think it is interesting that the only people to answer you, thus far, are Pot Head Pixies....]
I have not heard any of their other work, but I look forward to finding and listening.
Edited by radiognome3