Joshua Ogle wrote an excellent intro to typography, a topic of which every developer should have a basic understanding.

Witness is a fun font from the creative team at Mars Hill. Bold and normal weights are included as upper and lower case glyphs. I especially like the W.

There is a growing list of great looking typefaces on Google's directory, however most look better for headlines. Ross Johnson has put together a list of great typefaces for body copy, explaining his selection criteria in his blog post.

Unless you're reading this in your newsreader, you're enjoying Bitter.

Ludwig Übele writing for I Love Typography:

I had in mind this idea of a wide and flat landscape. This was the initial idea: Tundra should lead the eye effortlessly along the line, thus emphasizing the horizontal.

Nice-looking serif face that delivers on that initial vision.