At the moment Wiimmfi supports more than 80 games. See list of all games for details.
To find out how to patch your Wii for the Wiimmfi competitions, click here:
Wiimmfi MKWii competition service
The reasons are very simple: I believe that every human being and especially young people must have more than one chance, and also at Wiimmfi.
New is, that only MACs used in the last 42 days are counted; older MACs are forgotten now. And this is a kind of automatic unban.
The problem was, that players without the correct distribution could enter private regions using the friend list.
The new MASTER needs much less resources (one thread, <6 MB RSS). But the main advantage is, that no more packets are lost and that the generic game table members are now handled much better (no issues known).