I ordered a Rainbowduino a couple of days ago and look forward to using it!
I searched the discussion forum for the power jack size on the Rainbowduino 3.0 and could not find an answer. I could only find the manual for the v1.2 Rainbowduino, which does not have a power jack. Can you provide the power jack size? Also, if you have a v3.0 manual, where can I find that?