>I once read a fascinating article (New Yorker mag, I think) about a couple of brothers who had build a computer to calculate Pi in their apartment. They held the world record at the time of the article.

That was the brothers Roi was referring to, maybe. It's not that hard to do really, with the speed we have now - it's what to do with the output that's in question, I think, once you have a huge, useless character file full of digits :)