My flickr feed is a lot more interesting since I got the iPhone 4 and Instagram. I used to not take as many mobile pictures with my old iPhone since the camera just wasn't that good. The iPhone's new HDR feature combined with the 5megapixel sensor makes it a pretty awesome camera. My dSLR has been gathering dust (i still plan to upgrade it though to the new Nikon D7000).
Here's some samples of some pictures I never would have taken with my Nikon.