Hi to my few readers!
So I've decided that I don't blog enough to warrant paying to do so year after year, so I'm moving back to blogspot. You can find my new blog here: http://rockit-girl-za.blogspot.com/ - please update your links/blogrolls.
And when I say new, I mean new - I'm not importing any of my old writing because (a) I don't really know how to, (b) don't really care enough to learn how to and (c) am rather liking the idea of a fresh start.
This is a 
Nat, not sure what sort of hosting platform you're using, but there should be some interface to access the database storing all your blog posts, and then dumping it to a file.
Also, check out The Movable Type Import / Export Format, it might be that Movable Type can export your posts to some flattened text.
I think it's worth the effort to try and save the data, even if you might not be importing it to Blogspot - you just don't ever want the regret of "damn, shoulda saved those posts!".
If you change your mind and need some help, I'd be happy to have a look at it for you.