As much as I'm a Nikon guy I don't think they've done much that has really been worth writing home about, so, based on innovation I'd have to say the new Sony a33 and a55. These new translucent mirrors, I think, are going to change the way that all manufacturers make cameras. I also think that the Canon s95, SD4000, and SD4500 all have changed what we think of in a pocket P/S. The back-lit cmos sensor they use is amazing allowing them to capture great low light photos without flash.