Kasper Souren is active on many wikis, including this one.
Some wikis I've helped set up:
- Hitchwiki, the hitchhiking wiki
- Trashwiki, the dumpster diving wiki
- Trustlet, a wiki about trust metrics and related topics
- OpenCouchSurfing Wiki, about opening up CouchSurfing
Another reason to work on this wiki is the convenience of OpenID.