Obligatory
http://slashdot.org/
It's the biggest science news blog I know of.
http://www.slashgear.com/
More of the like, except focuses on tech and less on science.
http://io9.com/
This is actually more science fiction, but they occaisionally post the more wild reality based stuff too.
http://www.geekologie.com/
Gadgets and geek stuff with vulgar humor thrown into the bargain.
http://www.engadget.com/
Pretty standard fare, good quality gadget news.
I could go on, why not post your own? :)
www.grinding.be is the one warren ellis asked everyone to set up. some really cool stuff on it actually.
www.gizmodo.com
www.gadgetsnoop.com
geeksaresexy.blogspot.com
Wired.com
I know its not a blog, hush now.
I was going to post that in the OP, but it slipped my mind at the last second.
(Off topic: Nice avatar colors.)
Boingboing is good too.
http://boingboing.net/