Do these no longer ship with power pigtails? Is it official that it's safe to run them in scrypt only mode without the fans?
If say only 0.5A is safe on those, that's 6W. Get a 12V adapter with at least 2-3 amps available I'd say.
GAW no longer provides power connectors with gridseed pods, and it is correct that single pod needs no more than 10 watt when in scrypt only mode (typically 7-8W with fan, 6-7W without, with VMOD1 and disconnected fan it draws ~9W @ 950 MHz, 9W = 12V * 0.75A). I run multiple gridseeds off brick style power supplies with splitters, 8 off 8A brick and 4 off 5A brick (should be able to do 6, it's just that I got bunch of 1 to 4 splitters) in either case brick is warm to the touch, not hot, and gridseeds are happy.
One amp PSU will NOT power two gridseeds (I tried ).
Search eBay/Amazon/meritline/dealextreme etc for 12V CCTV splitters (you need 2.1mm diameter barrel connector), eBay/meritline/dealxtreme route is cheaper than anything else. There are 1 to 4 splitters available for around $3, and 1 to 8 for $5, oftentimes with free shipping and even for less if you are willing to wait for delivery from China. Also on ebay I saw bundles ob brick PSUs and splitters.