I don't really like blogs and don't read them regularly, but there are a couple worth checking out periodically, including BtBG, Planet Algol and Your Dungeon is Suck. Also, JM's Grognardia has interesting things sometimes.When I want old school inspiration, I visit Beyond the Black Gate.
I'm fond of Gnome Stew.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.