After latest round of updates, was only able to boot to command prompt, with error message something like "failed in wait for x". Had been using Xorg-7.7 with xf86-video-nv.tcz to get correct resolution for my monitor, without problems.
After some fiddling, got a desktop after deleting xserver modules from tce/optional, but Xorg-7.7 doesn't work (of course), so using Xvesa although it doesn't have the best resolution.
Any help appreciated (including pointing out my dumb mistakes if any!). Thanks.