just the basic huffingtonpost.com, bbc.co.uk(yes really, some partly consider this propaganda), freakonomics.com, HackerNews, Digg(yes I still check it from time to time), LinkedIn-News(this one is more based on who/what I subscribe to follow so this might be a special case)... oh and until GoogleReader disappeared I had TED.com feeds to read from time to time. I need to resubsribe with a different rss-reader.
I think these sites are pretty balanced sources of info & news, but I do understand that huffingtonpost leans a very deep left-wing. Not extremist, but pretty deep. Though I don't recall them outright purposely lying about stuff.