Well, I've pretty much finished the redesign. The sidebar is better, as are the comment forms. Plus I've redone the Comment Preview page. The remaining issues that I know of are:
1) The search page still has the old template. Anyone out there familiar with MT who can tell me where I need to go to change that template?
2) The cool hover effects in IE seem to have broken sometime during my fiddling. I'm pretty sure it was working earlier today and yesterday, but they aren't working now. But I'm too tired to do any more troubleshooting, so it will have to wait a few days until I have some time. Sorry.
If you run across any more issues, let me know in the comments.