I think gamepad support is a must here. I bought myself a 360 gamepad the other day and noticed how many games don't support it natively. One thing you could do is atleast implement Xinput, but I think a more general solution would be better.
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i think it's planned. i wish i knew how soon it'd be here -- i don't know whether or not it's worth it to spend the time integrating joy2key into my game directly.