Re: Any way to make the display name the username instead of the first name?
@rossagrant – Not certain that these core hacks will be in for v1.2.4, but I’ll see if I can sway the dev team 
Re: profile loop – http://testbp.org/members/andy/profile/ – it’s the part right underneath the profile tab.
I just noticed a small bug and just put out v0.51. If you can’t wait for WordPress’ plugin repository to update, you can manually download the files here:
https://plugins.svn.wordpress.org/buddypress-usernames-only/trunk/
