http://wii.hl2world.com/supposedly you can finally target like how you're supposed to with the wiimote without using the other crappy mouse -> wiimote hackery (that is, it actually uses the sensor bar and extrapolates where you're pointing from that)
i'm going to try this out on my macbook when i get home; i've no bluetooth support on my desktop

EDIT: never mind, the developer is a fucktard, it's a closed beta test for now