Google and charity
They seem to have money they don’t know what to do with.
This doesn’t mean SIAI is a good match, but it might be worth thinking about.
I’d say the most obvious choice for google and existential threats would be (if feasible) applying cloud computing to watching for potential asteroid strikes.
They sponsor the Turing Prize, which seems to be about going faster, not slower.
Google is already supporting Singularity University.