Some ideas what could be improved:
contacts: a normaler user still needs systemrights "can manage contacts" otherwise he will not see any contact at all.
adding a new user to contact list: first+lastname, both are written to the db field firstname in table og_contacts. why not add the avatar at the same time?
contact list:
would be nice for the admin to preset the colums which are displayed (and to remember them!) and the posiblity to sort not only the names, a filter would be very nice eg. show all members of department xyz..
(where are the preset for that in the code..? I was not able to find them yet..)
atb
Joerg