It'd be a great way to publicize bitcoin to the masses beyond this techno-elite/libertarian spin in the mainstream media.<p>http://en.wikipedia.org/wiki/SETI@home
It could be coded. Anything can be coded. But it wouldn't really be worth it for either party imho, even if you used idle GPU time.<p>Let's do some math...<p>Let's say that the average GPU can mine at 1GH/s and that everybody using your screensaver had that (non-existant, overly generous) GPU.<p>You would need ~6,000 participants participating 12 hours per day to equal the power of a single KNC Neptune ASIC miner.<p>It would cost those 6,000 participants about $10/month just to take part. Or about $60,000 per month total wasted on electricity, for a project that would net about $15,000 in mined BTC: <a href="http://mining.thegenesisblock.com/a/cad4e45c7b" rel="nofollow">http://mining.thegenesisblock.com/a/cad4e45c7b</a><p>And that's if you were able to get up and running by february.<p>In march, that $60,000 wasted on electricity would only net your charity $7,640. And in April, $3,900.<p>Had those 6,000 participants simply donated $10 to your cause, you could purchase 6 KNC Neptune miners to mine Bitcoin for you and your cause.