Importing the archives from Blogger to MT went incredibly smoothly — got it to work on the first attempt.
The only outstanding issue is the sidebar in the individual entry template. I got it to work with no trouble at all on my other weblog, but for some reason it doesn’t want to work here…the page gets cut off at seemingly random spots (random from page to page, but always the same spot on a given page, no matter how many times it’s refreshed). I even went so far as to copy over the whole template from the other website, and it still did the same thing.
So, unless someone can explain this to me, there will be no sidebars on the permalinked entries or archives.