I see nowhere to edit the username formating in admin/functions.php.
The only thing I found that look a little like it is the following (from line 225):
PHP Code:
} else {
$postsperday=0;
$post[username]=$post[postusername];
$post[usertitle]="Guest";
$post[joindate]="Not Yet";
$post[posts]="N/A";
...
which defines the formating for guest users.
I guess this one is more complicated than the previous formating hacks I did. I might need a little more help with it.
Thanks