HA! My buddy John Kovalic surprised me with a nod to Bill in last Wednesday’s Dork Tower (one of my favorite comics) – HAHA! Can you find him? (click to see larger view) – Big Thanks, John!! And my friends, I KNOW you have all heard of and read Dork Tower, but to make this easy, here is a link to the strip – and to John’s awesome comic, of which I am a long time reader, from waaaaay back. 
And if you missed it, check out Crson and Igor’s cameos in last MOnday’s LoB, right HERE!
Yeah. Found it (very clever and subtle). But I’m not breathing a word.