Chad Clark's Open Journal : 2009-10-14

1) 35th annual Nikon Small World Competition awards top images

Scientific American has a slide show of the the 20 microscopic photo competition prizewinners.

You can also check out the the official gallery with many more "Images of Distinction".
The gallery also goes back to 1977.  They even have a quiz where you can guess what different images are of.

Here are a couple samples from this year's winners.