* Coding the Wheel - http://www.codingthewheel.com/
* Good Math, Bad Math - http://scienceblogs.com/goodmath/
* Gödel’s Lost Letter and P=NP - http://rjlipton.wordpress.com/
* Polymath Programmer - http://polymathprogrammer.com/
* The Endeavor - http://www.johndcook.com/blog/
* Programming Praxis - http://programmingpraxis.com/
* Pragmatic Bookshelf News - http://www.pragprog.com/news/
* Sutter's Mill - http://herbsutter.wordpress.com/
* Schneier on Security - http://www.schneier.com/blog/
Not so much.
Not that there's anything wrong with that. I do find it funny that he put Zed in that list.
Planet Apache can be interesting (an aggregator of apache committers). Extreme variation in quality, but James Duncan Davidson and Sam Ruby and a few others make it all worth it: http://planet.apache.org/committers/
Anton Chuvakin for security: http://chuvakin.blogspot.com/
I've found a lot of cool stuff that way.
* Joseph Miklojcik (emacs, lisp, languages) http://jfm3-repl.blogspot.com/
* Mauricio Fernández (functional, with ocaml focus) http://eigenclass.org/R2/
* Colin Percival (tarsnap, freebsd security) http://www.daemonology.net/blog/
* Matthew Garrett (mobile linux, power management) http://mjg59.livejournal.com
* Brad Fitzpatrick (memcached, pubhubsubbub) http://advogato.org/person/bradfitz/diary.html
* Chris Neukirchen's Trivium (all links, great jumping point) http://chneukirchen.org/trivium/
Mostly I just follow HN and proggit. I'm not very big on blogs.
Gödel’s Lost Letter and P=NP - http://rjlipton.wordpress.com/
Igvata - http://www.igvita.com/ (Ruby based, sometimes too terse)
The Frontal Cortex - http://scienceblogs.com/cortex/