I recently designed some t-shirts and gear which can help you spread the word about the Trilogy Release.
There are several shirt designs, each of which says "I still play Marathon." in bold letters on the front, with "trilogyrelease.bungie.org" beneath (URL used with permission). The backs of the shirts carry the favorite Assimilated B.O.B. phrase "FROG BLAST THE VENT CORE"
Also available are bumper stickers, those trendy oval stickers that everyone puts on their cars, mouse pads, wall clocks, hats, mugs, laptop bags, and more.
Please check them out!
http://www.cafepress.com/PlayMarathon