A new interesting controller for PCs is about to be released from Razer the Hydra. Looks quite similar to a wii controller but this looks to be more precise. At first glance it might seem a little awkward to use and it really doesn't seem like something you would want to use for heavier FPS sessions but to have some fun times it looks very promising.
Hydra in action in Portal 2
Although this fun comes at a price of $139.99 /€139.99 that's the portal 2 bundle
Pre-orders have started in May and its expected to ship in June.