[dspillett]

I've been saying for a while that I'm surprised no-one has written a BitCoin miner in JS and started pushing it out to connecting browsers. Given how much time a pop-under advert can sit no someone's machine before they notice it could be relatively lucrative. You'd not get a lot of processing per client per block of time even with the best current JS JIT compilers (especially as GPU mining is where it is at now), but if you have enough machines with your pop-under sat hiding from the user it might make enough to be worth the hassle of porting the code in the first place.

[Kenan]

Embedable miners have been done before.

https://bitcointalk.org/index.php?topic=9042.msg130817#msg13...

[Drakim]

I seem to recall that somebody HAS written a BitCoin miner in JS. It was even posted at HN. Can't find it now though.