I just signed up for Posterous. Their whole focus is that you can very easily post through email. That's fine and all, but Blogger and Tumblr (and maybe even WordPress) all offer that, too.
Anyway, I'm checking it out and wondering what you use for your publishing endeavors: Blogger? WordPress? Tumblr? Twitter? Posterous? I know there are more, dozens more. I'm sure I've signed up for a few that I've forgotten about.
Vote on which ones you use in the poll (upper right corner) and then leave word in the comments about which is your favorite and why.