I've noticed that my forum avatar shows up attached to my Pantheon score and in the heading of my Friends tab. It would be nice if people's avatars could be displayed in-game too (in a scaled-down version, of course), or if there was a way for us to upload smaller icons for use in-game. I'd particularly like being able to have the avatar attached to the floating health bar that's displayed when you hit '~'. (again, I stress, I expect the avatars would be scaled down)
The main reason I'm asking for this is that it would make it a lot easier to keep track of who was who in games that have more than one copy of the same demigod. "There's one of the three UBs on the other side ... let me mouse over him to see if he's the scary guy or one of the ones that hasn't got enough levels yet to be invincible ... OMG RUN TOO L-- *dead*"