If you’ve got a Posterous blog, or blogs, you need to grab them now; Posterous is closing down on April 30.
Full instructions are on the page; they’re easy. You just click the Backup bottom, and you receive a link to your zipped blog archive.
If you want to move your posts to WordPress, here’s how.
I haven’t received my Zip file yet; I doubt I’ll be moving the entire blog to one of my WordPress sites, but I will be retrieving useful material.
So — go on, grab your zip now, before your blog(s) vanish forever. :-)