Quality of life:
an XML feed listing for each players:
_date SG was joined
_date of last logon
_rank
_hero description
_origin
_archetype
_level
_powers (not only sets but selected powers)
_badges obtained
_total XP
_current XP gained
Not really concerning in-game but a feature that will be useful to ALL fansites.
For in-game features:
_fix the current bugs that prevent from listing by columns(by last login doesnt function for me currently)

_allow multiple players selection for leaders to invite/send message to more than one members at once.
_a small calendar(current month or week only) in which Leaders could set events,rendez vous,etc...
_ability to have a short help/Description of the SG (aside of MoTD) that allows some HTML tags (like UBB codes except for images).
Thank you.