More psychedelic (a la late period Beatles) than straight prog, and not particularly well known, but I think many folks around might really enjoy their stuff. Their website:
http://www.pillbugs.com
They're from the Toledo Ohio area and have 3 albums out (a 4th on the way) plus two under their previous name The Mark Mikel Hallucination. I know the band a bit and if I can be of help in getting them into the catalog, please PM me.
Thanks!