thousandtyone

Seth Godin has a blog that's short and sweet: http://www.sethgodin.com/sg/

http://blog.penelopetrunk.com/ is interesting when it comes to career advice.

http://www.codinghorror.com - technology related.

http://www.themiddlefingerproject.org/ - another smart blogger and not very mainstream.

http://randsinrepose.com/ - writer of managing humans. has an impressive blog.