The "gopher bringing the keys" graphic on the front page is of course a basic remix of Go Language Gopher mascot. The keys are from Openclipart.
I made several improvements to the Go language implementation of OpenPGP in go.crypto to support Hockeypuck needs, mostly with regards to OpenPGP parsing. The review process improved my Go programming habits and was generally quick and easy. Go is an enjoyable project to contribute to! Also, rietveld is awesome.
The sks-devel community has given me great advice, direction and feedback on Hockeypuck, and helped me quite a bit with understanding the SKS reconciliation algorithm and other implementation details.
Hockeypuck would not be where it is without the Go language standard library and other packages it is built on. See debian/copyright for a complete up-to-date listing.