I didn't want to burst your dream bubble when I first read your post but as the other members stated, it is impossible. As far as I know, the CELL architecture specs was known since 2004 and it has taken Sony two years (and more) to build a game console system on it. I can't imagine how long it will take hyperion to write an OS for it.
On the other hand, I don't agree that the cell was not meant for the desktop. It all depends on supply/demand. If enough volume is demanded cell prices can get low and a clever company can come up with a board/system to offer desktop cell computers. I think it's quite possible, however I'm pretty sure that Amiga will not be that company. (maybe apple ?)
