I tried the latest build of hashkill on my dual 6990 setup and I'm blown away with the performance. I think it's a great tool and look forward to see where things will be headed. I have been having trouble with connectivity to btcguild.com Phoenix 1.48 has been running rock stable (although with 10% lower speeds), so I think there must be some LP issues there.

One thing I've seen is LOTS of stales. When I used the latest hashkill with deepbit, I noticed I had 7% stales, that's plain crazy. I've tried tinkering with clock speeds, cooling other pools, nothing really helps to resolve this.

If that would be resolved the following would make hashkill slaughter the competition:

• config file
• some type of RPC (JSON-RPC anyone) interface for managing operation and querying status of miners (hash speed, temp, pause resume queue, etc)
• ability to adjust fan speeds automatically and provide ability to set min and max speeds per card
• either prioritize workloads per GPU or per GPU temperature... it would be good for long term operations to have all the GPUs working at the same temperature
• an aggressiveness setting

If a solid RPC based management interface would be implemented with queue/workload management than I would be willing to put in some time to write the tedious interface bits in python