Comments are slow -- but solutions are on the way - UPDATE: Comments and site are quicker now
I think I've found a few solutions after searching around on the Moveable Type Forums as to why comments on the site are so sluggish (just a bit of overuse of some MT tags). I'm going to be moving them to PHP includes so just single files need to be rebuilt instead. Hopefully that will fix the problems with comments posting slow as snot and the site being very sluggish on rebuilds. Then maybe my host won't be mad at me for kicking the crap out of their server ;-).
Update: It looks like things are back speedy. I'm still working out some bugs in the comments pages themselves, but my full rebuild just took FAR less time than it used to. Post a comment here to test it out with your results.