There's a bug affecting the s3cmd package in the wheezy repository. The experimental branch has an updated version that I require.
I added:
deb http://ftp.us.debian.org/debian/ experimental main
deb-src http://ftp.us.debian.org/debian/ experimental main
to my sources list. Ran apt-get update, then I ran
apt-get -t experimental install s3cmd
Which just says the package is at the newest version. But it's clearly not. What's going on?