v3.3 is available:
- Improved mining speed up to 5%, depends on card, I get 650 h/s on stock 290x.
- Improved stability.
It seems I fixed issue with bad performance on 280x, though not sure, on my 280x it works fine.
I guess if you're going to keep updating as much as you are, then I do not see a problem with the 5% dev fee. You've updated more than any dev I've seen so far.
What I'd REALLY like to see, is an nvidia miner if you could come up with that.

Other than that, I plan on ordering a ton of 270's (non-X) to mount into a rig. Don't suppose you could come up with a linux version of this?