I managed to write a quick and dirty php script to migrate my existing MT entries in MySQL to WordPress, which was a paltry 147 entries. However, using php’s ereg_replace and preg_replace functions, I was able to translate all of my MTMacros during the transfer. It was much simpler than any of the alternatives (manual mysqldump and edit — yuck!) and it was clean. I will be able to modify the script to migrate the other 2 weblogs I host (at time of this writing, I've already done one!).
ThemeDorks is still in the infancy stage but already surpasses other Theme Dev Site by a lot. I can't wait to see what's in the next release!