Decided that, now that I've got more free time, I may as well give my computer a clean install of everything.
For OSX: Attempting to install Chameleon Bootloader so I can use a 64-bit kernel.
For Windows: Trying out the Win8 Release Preview.
For Linux: Switching to OpenSUSE.
So far it's been rocky. Something's not quite right with Chameleon and I can only boot OSX in 64-bit mode if I do it in safe mode. Haven't been able to determine where the problem is, as the last few lines of verbose boot happen whether it's in safe mode or not. If it's not in safe mode I get a freeze on a white screen, with mouse pointer visible. While I'm considering trying to upgrade from Lion to Mountain Lion to see if that fixes the problem, I've seen people report similar issues in ML and I wouldn't want to spend $20 on discovering I still have the same problem. (Plus if I switch to ML I won't be able to fall back to a regular, non-Chameleon EFI boot like I can with Lion.)
Win8 -- well, it's set up. The parts that look the way they're supposed to look pretty damn good; the icons, tiles, and fonts are all really attractive. A lot of legacy stuff -- like program installers -- looks like blurry hell, but I'll give MS the benefit of the doubt and suggest that maybe that's because I'm using a beta. Not sold on the Start Screen yet, the shit that's moved is not easy to find, and switching between Metro and Oldschool-Style programs is unintuitive as fuck.
As for OpenSUSE, well, haven't had time to install it yet. Stay tuned.