Other kind-of-still-living communities formed around Starcraft campaigns:

[Campaign Creations button]Campaign CreationsThe Canada to Antioch's US of A. Features campaigns and custom maps for Blizzard games.
[Star Alliance button]The Star AllianceMagic and Co.'s corner of the web. It apparently died and was succeeded by Game Weavers, which looks dead too.

Hosted Sites

A number of old community web sites are archived here, to the embarrassment of all involved:

Additionally, Admiral Styles' Love and War RPG is hosted here as well.