I know there are many market blogs out there, some good, some less than great. There are a few I read almost daily that deliver quality content, refreshing perspectives, interesting links, and update frequently.
TraderFeed - Psychological perspectives are unmatched imo. Always posting interesting topics historical and otherwise.
The Kirk Report - Link posts are awesome. A full days worth of news in a nice easy to read format. Other posts are insightful and to the point.
Trader-X...views from a distorted mind. - Good overall blog, thought provoking and informative. I like his philosophy on trading.
uglychart.com - Probably one of the most honest, open market bloggers out there. Ugly doesn't mind sharing his triumphs and struggles. A unique look into what a trader thinks about along his journey.
Trader Mike - Great market chart analysis every now and then, quality links to interesting news and other blogs, and a great archive of information.