You would, I suspect, have to specify how many bitcoins you would be wiling to donate to the SIAI or to Kevin by way of compensation for the hardware. With a suitably cheap power supply available it is plausible that both you and Kevin could profit from such an arrangement.
Now you can donate to Singularity Institute using Bitcoin.
Currently Bitcoin mining appears to be profitable as only bubble economics can be. Already some Less Wrong users have purchased GPUs and started mining Bitcoin. Please consider sending some Bitcoins to SI at address 1HUrNJfVFwQkbuMXwiPxSQcpyr3ktn1wc9
2014 Edit: Please donate Bitcoin by using the Bitpay link on MIRI's donate page. Thanks!