Usually I don't pimp out blog competitions, as too often they end up honoring crackpots, climate denialists, etc. But here (via Phil) is a contest sponsored by Physics.org, where the other entries are all very good blogs:
Admittedly they left off some other very awesome blogs, but there's always next year. So, yeah; I'm happy to advertise blog competitions in which I wouldn't mind losing. There are also competitions for best podcast, best online magazine, etc. Let your voice be heard.