There were 2 Tennis games and a few other worthless ones, though all the attention is currently on the next Zelda game where I believe it will be a requirement.
On the bright side maybe more announcements at E3?
Anyway, it's still more support than the Wii Speak peripheral - Animal Crossing, Endless Ocean: Blue World, Monster Hunter Tri and the Wii Speak Channel. If Nintendo asked me, ALL online games (which are in and of themselves admittedly few and far between) would have Wii Speak support.
There are 19 wii games and 3 wiiware games that support WM+. http://en.wikipedia.org/wiki/Wii_MotionPlus I don't think WM+ would have been useful here. It's good for rotation and therefore best for sports titles or for swordplay. If it's primarily used as a pointer (and basic motion) like in SMG it's not needed.