I've been noticing for some time that when playing Baseball at WiiSports, as the pitcher, pressing the Digital-Pad (the Cross) on any direction lets the Wiimote vibrate. Pressing these buttons apparently doesn't change anything.
Out of boredom, I've been trying different things, like pressing up, down, up, down and then throwing a speedball, it sometimes returned into a Strike for the batter. Probably coincidence, but...
... anybody knows, if that is doing something? Pressing the Digital-Pad?