The TOPFRIENDS plugin (probably being renamed to USERLIST) is a plugin capable to show up a user list like the one in tiki-list_users.php with the number of rows you want and, in a few days, sorted as you wish.
Typical Uses
It's mainly usefull to list you most participating users in a wiki page (that's why I did it for)
How to use it
Just put the TOPFRIENDS plugin as show in the example on quick help.
The parameters it takes are the following:
limit : Is the limit of rows you want to show up.
public: If set to 'n' then tiki_p_list_users is required for viewing the list, elsewhat nothing is shown.
Note: this has been introduced on Tikiwiki 1.10 (head)