sorry but a lot of bad examples in here.
HDR pictures are best used when you brigthen up the dark spots and lighten down the dark spots and get a very nice range of colors, not any of this pastel bullshit. If you wanted to make pastely pictures, paint something, don't overuse it in photoshop or photomatix.
Most of the pictures here have A LOT of underexposure to be even called an HDR.
Here are some good examples of HDR with the right amount of exposure, no unders or overs.
VVV this is a really good example, nighttime HDR, 4 pictures and hardly underexposed or overexposed, very good balance of both and it's pretty colorful.
there's a bunch more on flickr if you search for it.