I don't have any IRL tributes (unless drawings and paintings count) but... I do have a weekly Glitch webcomic called This Quiet Ur! http://www.thisquietur.com
My car license plate is XALANGA which is a pretty apt tribute. It is also a very cool remembrance now as I had a very dear friend in Kenya who just passed away of cancer in March. She and I had always talked about retiring to South Africa to co-own a bed and breakfast. The day we said our goodbyes, we laughed about Xalanga together. I will be jumping around with her there in my dreams!
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http://www.thisquietur.com
(oh, and the poster I made for the 1-year anniversary of the closing of the game: http://camiavellar.com/glitch_anniversary_illustration/ )