+ Added a 'created' field to the users table and renamed the 'timestamp'
fied to 'changed' (cfr. node table). Update.php will try to determine
a 'created' timestamp for existing users.
+ The profile module no longer uses serialized data but has its own set
of tables. Known existing profile data is migrated by these new tables.
TODO: migrate the birthday field.
+ The profile fields can be grouped, and within each group, profile fields
can be sorted using weights.
+ The profile pages can be themed.
+ The profiles can be browsed based on certain properties/settings.
+ Change the _user hook: (i) 'private_view' and 'public_view' are merged
into 'view' as there are no private fields and (ii) 'edit_form' has
been renamed to 'edit'.
+ Avatar handling has been refactored and is now part of the user module.
The users table has a dedicted 'picture' field.
+ Simplified the way themes should use display/visualize pictures or
avatars.
+ Made it possible for administrators to replace or delete avatars.
+ ...
I hope this make for a good base to build on collectively.
Dries Buytaert