If you get real friendly with your local Apple shop (not the Apple store) you might be able to get them to order some parts to put together a Mac of your own. There are some out of warranty logic boards available, as well as processors... I am seriously thinking about doing this early next year, depending on the bonus (if we get one). Of course, I will have to get a case for it and all the goodies, which will add up. I might just get a regular cd/dvd-rom drive, but then again, I might get a combo drive (depending on the cost difference). I will have to put together a cost/feature list and then decide. I might be better off just getting a new Mac tower and transplanting it's guts into a different case.
All of the above IS legal, since I am building it for my own use, and using mostly Apple parts. Unless I get a new PowerMac, I probably won't have any warranty, which won't matter much to me. Mainly because I know the parts will last (I'm also fairly certain that the parts will come with a short warranty, to make sure they work when they arrive).
That would be a FrankenMac tower... If I end up doing that project, I will put up some pictures of it... 😀