Wow... I didn't realize you didn't know there's a whole CProg movement out there! Here are some starter links:
http://www.cprogrock.com/ is the homepage of the Christian Progressive Rock (CP
compilations, has links to the artists' sites.
http://home.att.net/~virtuosity/ has reviews and interviews of many many CProg artists, along with a few other 'spiritual' artists (not necessarily Christian).
There is a CProg Yahoo list too, if you want to join that.
If nothing else, check out Iona... Oh wait, you already have.
