stoa related links:

official site ** new!
projekt records
hyperium records
stoa entry in gothic.net band decriptions

where to buy

Isolation Tank
Middle Pillar (never ordered from them, but have heard good things. Slightly more expensive.)
CDnow you can get stoa albums here for 13 bucks now! This leads me to believe that the albums have been re-released. Yay!
Amazon.com (again, imports are pricey.)

Urthona is out of print now, so I suggest that you snatch up a copy while you can!