The Hypertext d20 SRD is an exceedingly useful site that every d20 game master and player should have bookmarked.
My gaming group is contemplating our first new Greyhawk campaign in about two and a half years. It's going to be a first-level campaign, set in our homegrown city of Obsidian Bay, and I'm going to be the primary DM. The game is still in its planning stages, but I've already identified a few themes.
The stirge. It is a monster whose name echoes down the halls of dungeon crawling history, evoking terror and scorn as it does so (terror for low-level characters trapped in a cavern with them, scorn for high-level adventurers all but immune to their blood-sucking attacks). This monster, whose roots date back to the dawn of Dungeons and Dragons 30 years ago, gets the royal treatment in Behemoth3's first horde book: A Swarm of Stirges.