The problem is managing them. First, if we let you link to them externally, you could easily break our site. So, that won't fly. If we allowed users to upload them - well, that bring a whole host of bad problems. So, what we're going to do is eventually set up a way where you can submit new avatars and we'll add them to the list of possible suggestions periodically (like the 7th Column Themes). One thing that won't happen is custom avatars (an avatar that only you can have). Only special people will get that (bungie people and a few others, mostly moderators and VIPs). However, it is not out of the realm of possibility that we create "classes" of avatars. For example, we could make it so certain avatars are only available if your account was a certain age. Don't worry, we'd never tie anything to total posts. Or, maybe we'll think of something else for fanclubs when they get the "new hotness" treatment. Maybe I've even already thought of a few things that I'm not telling you about. With me, you never know. Plausible deniability is key.