Since I've got a few minutes to spare today, I thought I might continue migrating content from Multiply to Blogger.
The good news is that I've already obtained the .xml file of the Multiply blog posts. :)
The bad news is that what have been imported before are imported again! So there's a bit of manual tweaking involved to get the two blogs in sync before the December 1 shutdown of the social functionality of Multiply.
At least the posts are now in Blogger. It's just a matter of determining which ones are duplicates of what's on Blogger.