Some new-ish physics-y blogs that you might not know about, but are worth checking out. (How do I know about them? Probably because at some point they linked to CV. Not that I ever check.)
Backreaction is a group blog, I think by [strike]some physics grad students[/strike] mostly postdocs. Sabine Hossenfelder seems to be the lead conspirator. Great fun posts, full of interesting physics.
Charm &c. is by an experimentalist at Cornell, apparently working at Fermilab. Otherwise mysterious.
Sexy Science is like Us magazine, for science. No physicists yet! Outrageous.
Galactic Interactions is by occasional CV commenter Rob Knop. Articles about tenure and funding are must-reading.
Brad Hoc is not entirely serious, but still he should post more. He's single ladies!
Just a small sample of relatively new blogs that I happened to have noticed. As of this moment, Cosmic Variance is arguably the largest physics-oriented blog on the web. But the idea is just catching on, and I wouldn't be at all surprised if we were overtaken at some point sooner rather than later. Which is great -- let everyone do their thing, and the quality stuff will bubble to the top. If you have your own science-type blog that you'd like to plug, or know of some good ones that deserve wider recognition, consider this thread the place to be shameless.