Aurgasm is a great music blog from a quartet of musos, guided by Paul Irish.
In their own words:
Aurgasm seeks to bring you an eclectic menagerie of aural pleasures. We scout out music you’ve never heard and deliver only the finest. Expect music curiously different, yet simply enjoyable.
Lots of popup player tasters and videos, and smart commentary. Seems to emphasize pop envelope pushers such as Russian Red.