hub: gmdns doesn't have a web page, or even a release. As long as you understand what it does (it's a Multicast DNS Responder) and where it sits in the super-duper Rendez-vous stack (that article should be a good starter), the API should be self-explanatory. The only problem is, as I could see tonight, that gmdns (and therefore its ancestor mdnsd) fail all of Apple's robustness tests (multiple TXT records, large TXT record, large NULL record). I've never written code that poked directly with DNS, but it looks like I will have to soon.

Watched Final Destination 2.

Update: not so grim, and not so gross, gmdns passes 2 of 5 robustness tests, after a bit of hacking. The rest might pass, it's just not tested :)