Note that holding overlapping regions gives you BOTH bonuses, though I have considered diminishing returns. I've played a game or two on a physical mock-up, and it doesn't seem noticeably unbalanced, but I would like input from some veteran players.
Edit as of 11/29/10
- Added an auto-deploy of 1 on the central square.
- Reduced the long cross-hair bonuses from 6 to 5
- Players no longer receive more troops just for holding 12 or more regions