We've been remiss at updating the blogroll, which I hope to do shortly. Here are some fun new physics-leaning blogs for you to watch out for.
Imaginary Potential is a group blog by five young (postdoc/grad student level) physicists in a variety of fields. This should be awesome, would love to see more like it.
The Inverse Square Blog is by Thomas Levenson, a science writer, film maker, and faculty member at MIT's Graduate Program on Science Writing. He obviously needed blogging to fill all that spare time.
Resonaances has been around for a while, and I'm sure I've linked there before. But not enough; Jester does a great job in relating particle theory talks and happenings with a spirited style.
Not to mention all the great non-physics blogs that keep popping up, of course. Feel free to promote (yourself or others) in the comments. Update:Chad Orzel and Michael Nielsen join in the fun, suggesting blogs and asking for pointers to ones they haven't noticed. So go there too and make some noise.