If you're really into poster art you probably already know about Gigposters, the site that lets you show off, comment on, and buy rock posters. My poster-making acquaintances are downright addicted to it.
The members of the Chicago Printers Guild are sure into Gigposters. A bunch of them have contributed prints to a group sale to help benefit the site. A very limited-edition set of 18 posters from 15 Chicago poster artists—including two prints by Jay Ryan and a triptych by the always-awesome Delicious Design League—is on sale for $175 right now.
There are only ten sets, so first come, first served. Poster freaks should probably jump on it now and figure out how to pay next month's rent later.