Well, I already updated Ian Sane's avatar back to his Batman look yesterday and I do have Broodwars Utah Jazz saved. I didn't update it yesterday since it seemed he could wait having announced his retirement. At the same time, not opposed to giving him something new. Nice to see that users want to help look after everyone's two favorite posters right away.....
As for GP, she's been using some evil queen like avatar for awhile ever since she popped back in here with BeautifulShy to say hi. I also have that saved and will upload it tonight so those users are already good. I've got Mouseclicker, Wandering, S-U-P-E-R, Phil, Plugabugz, Dasmos and KDR_11K also off the top of my head so they'll be good. I suppose you may want to wait for me to finish up using what I've still got saved to see what's left over then. I'm pretty sure I've got nothing for Knowsnothing, Miyamoto, Mario, Degullo, Chozo Ghost, Infernal Monkey, Nile Boogie Returns, or Kytim89 for some names if you are looking for inspiration. Some of those I can picture the avatar for and some I can't.