There is a Gary Gygax Fund Testimonial page over at the Gygax Memorial Fund site. If you've played D&D in any edition for any length of time, or otherwise been affected by they guy's work, then maybe you'd like to drop by and say something for posterity's sake.
There is also a nice post over at Harvard's Blackmoor blog regarding the idea of producing a memorial miniature for Dave Arneson, co-author of the world's oldest Fantasy RPG. I think this is a great idea, and it reminds me of the cover to the old Painting Miniatures for Tekumel booklet that Tekumel Games put out in the old days that showed a wonderful Ken Fletcher illustration of a Pe Choi painting-up a Professor Barker miniature on the cover. I know that several others names have been bandied about as also deserving a commemorative miniature, and they are all deserving indeed, but let's not forget the good Professor. He produced the first RPG setting back before anyone else and the deep and often overlooked influence of Empire of the Petal Throne cannot and should not be denied. He hasn't left us yet, so it might be fun for him to see this happen before it became a posthumous sort of honor.