Naming servers. Doesn't matter if you use colors, or star trek characters, or nautical terms: plug the existing servers into a set and get a couple new name suggestions.
This was my only valid use for sets too, I can kind of see why it wasn't a project worth serious time maintaining. I always thought it would eventually be integrated into Google Proper via a comma separated syntax or something.
I didn't say it's not possible to find a list of characters. Wikipedia has a list page for everything. But the specific claim was that one could plug set elements into a regular search to find more set elements.
This is my current goto for naming duties:
http://en.wikipedia.org/wiki/List_of_lists_of_lists