It would be nice to pick up other parts of the profile for the display name. For a game site that I'm currently running, I use first name and last name and ask users to put in their "character name" and "guild name" in the first and last name fields respectively.

If I could either (a) pull these values off custom fields in the Membership provider, or (b) have some extensable/flex-fields in the ActiveModules profile - that would be super.