"Objective journalism is one of the main reasons that American politics has been allowed to be so corrupt for so long." ~ Hunter S. Thompson
There ain't a whole hell of a lot we can add to this. You might rank them in a different order. And we added some search engine results at the bottom if you want more. You might prefer different search engines. You just have to be difficult, doncha?
The Daily Chronic (broad spectrum of news)
The Cannabist (a newsy offshoot of the Denver Post)
OregonLive: Marijuana (the Oregonian offshoot)
Comedian/activist Ngaio Bealum's column at the Sacramento News & Review.
CannabisNews.com (from mainstream news sources)
Marijuana Business Daily (solid business news)
Marijuana Venture (for professional growers and producers)
The National Marijuana News (mainstream news sources, plus an incessant radio feed)
MJ Headline News (news from US and Canada)
CannabisLink.ca (news from Canada)
Cannabis Digest (news from Canada)
Can-Do Research Blog (mostly for stock investors)
Kind Green Buds (cannabis investment PR wire news)
The CannAdvertising Daily (many sources but mostly High Times)