Release a fork of cgminer which supports RPC calls to modify parameters and get stats for use in headless hashing farms and I will give you a 20 BTC bounty. That's a 4000% increase in your net wealth.
If you can't do that well the general idea applies. Do something which someone else considers valuable.
Out of curiosity, what parameters would you want to modify? (all of them?) and what stats would you want to retrieve?
Eventually everything that can be done from the command line however at a minimum.
* ability to quit cgminer
* get temp, MH/s, shares accepted, share rejected (both overall and per card)
* modify clock, memory, intensity, fan
* dead/sick GPU notification