Check out the all-new posters section at Rockstar Warehouse, "offering limited-run poster reprints of classic titles from the Rockstar catalog." The prints are available for $15.00 each, and sizes range from 18x18" to 24x36". Rockstar have also released a bunch of new desktops and avatars - the latter of which are now available on our forum.
This IV poster (22x28 inches) can be bought for $15.00
Stay tuned for more GTA IV updates. We are expecting new info in October.