Guild Name Generator
Have a great group for a guild but can't come up with a good name? At PARC's PlayOn group, we found a basic grammar that was able to correctly parse about 90% of guild names we collected from a 3-month period in World of Warcraft over 5 servers (~22,000 guild names). You can find a detailed description of the grammar here.
This allowed us to create a guild name generator that used the grammar to create new guild names based on the weighted vocabulary of World of Warcraft guild names.
Note: If the guild name generator comes up with a name that is not PG-13, please don't post it in the comments :)