I knew THAT subject line would get your attention. Slave Labor Graphics currently has Rex Libris issue #1 listed as a freebie ... you just pay shipping (it's a lightweight comic book, how much could that be?) So if you've been contemplating trying out the tale of the gun-toting, go-to-any-planet-to-forcibly-collect-an-overdue-book librarian, now's a good time. There are other free items on offer too ... just click on the "free stuff" link in the menu on the left.
The free promotions are generally for a limited time, so don't delay if there's something you really covet.
Note: not affiliated with SLG in any way, other than buying their stuff. :p
P.S. Forgive them the "picture not available" boxes in some areas ... the company just migrated to a new web server on the weekend and revamped the website at the same time, so they're still twiddling stuff.