BuddyPress.org

Paul already mentioned this. It’s possible, but requires some workarounds.

You’d need to unhook how BuddyPress catches URI requests and route them to groups.

The comments below are for people who know their way around WordPress:

– The catch URI function in BP is the bp_core_set_uri_globals() function located in /bp-core/bp-core-catchuri.php.
– You can unhook this from the “bp_loaded” action. Then write your own function to catch URI requests. Would be good to duplicate the function and look at the BP_ENABLE_ROOT_PROFILES section of the code to modify it to read groups.

Hope that gives you some pointers!