Knowing that the Internet is huge, I know that I have missed many more cameos or contributions, so post your favorites or weird ones out there that you think should be noted.
The Guild season 5, episode 8 featured cameos by Erin Gray, Colin Ferguson, Tom Lenk, Dichen Lachman, Eliza Dushku and Grant Imahara.
but the best cameo in there is Kevin Sorbo.
Similarly, Alan Tudyck’s Con Man is packed full of cameos by Sci Fi alums (including Joss Whedon).
Epic Rap Battle of History has tons of cameos by other youtubers like Rhett and Link from Good Mythical Morning, Grace Helbig and Smosh but their biggest names have been Snoop Dogg and T-Pain.
I wouldn’t think it really qualifies as a cameo if the person is the star of the short, does it? But then again, I guess they’re not directly credited, so that qualifies?
I think that is OK, I will allow also “guest starring” roles, I’m interested in cool or interesting appearances from old media guys and gals that show up in web only productions to share with others. I’m also looking for cameos or guest stars from other Internet productions like: Angry Video Game Nerd VS. Nostalgia Critic
Marvelous TV started a series of Marvel superhero parodies called “Bad Days”. Stan Lee shows up in most of the episodes. Not really weird or uncredited, but definitely neat.