Pre-installed linux hardware.
Some companies are trying to sell PCs with pre-installed Linux. Hopefully they fare better than VA Linux did. One that looks interesting is system76.com. They ship with Ubuntu, and have some interesting form factors, including one that is a dead rip-off of the Mac Mini.
My notebook PC (an Apple Powerbook) is getting a bit long in the tooth. It's soooo dog slow, that I would like something snappier. The new Mac Pros are very nice, but so expensive. A nice, light notebook without a Windows tax might be a good alternative.