Too bad about Stan Lee... despite working at Marvel HQ in NYC for a year and a half, I never ran into him (not sure how often he showed up since he moved to CA; I worked on the New Media floor anyway). While I wasn't much of a print comics fan growing up, Stan's touch reached to all media. He was indeed a pioneer and his cameos will be missed in all future films. RIP

[Updated the list, incl. names posted since my last update -- let me know if I missed anyone, and don't forget to audit your lists before the end of the year]