Possible account information APIs? (lookupd etc)

[Bill Nottingham]

William Jon McCann (mccann at jhu.edu) said: 
> 1. Query / store user photos (avatars)
> 2. Query user account status in an implementation/backend independent
> way (locked, expired etc)
> 3. Query the user's real world name etc (ie. not just gecos)

By this, you mean more than just the name in gecos?

> Darwin seems (at least from these docs) to use lookupd for some of this.
> 
> Anyone have any experience with lookupd specifically?  Or pointers to
> different solutions?

First, is there even any standard for storing any of this extended account
information?

Bill