When you update your profile and fill in the AIM and Yahoo and MSN and SteamID, and then look at your page, then you'll notice the AIM part is the same as what you typed in.
AIM: Example555 ^ ^ | | Black Also Black
And for me, I had a slight bit of trouble reading it, and I was the one who wrote it. Maybe the AIM part should be differently coloured and such so it's more noticeable.
This isn't a very big deal, it's just a small thing that I find inconvenient, but I thought I should just throw it out there.