I bought four hd5870s but was only able to run two because of heat issues. I took it down to install liquid cooling, which is having a bunch of snags, and the downtime has cost me dearly :-( Fortunately, I made a decent stash while the two were running.
since I plan on leaving my profits unrealized I wasnt willing to spend that much on such a risky venture.
There seems to be quite a bit of a Bitcoin interest around here, with several articles about it already: [1 2 3 4 5 6 7]
I propose that links and generic Bitcoin comments should be posted here, instead of making a new discussion thread for each interesting article about the subject.