[armon]

We designed the `serf` library to be able to be easily embedded, so hopefully it can be of some use. Unfortunately Serf does not make use of any sort of NAT traversal currently. We've open sourced the project hoping to get the community involved, and NAT traversal is something we'd gladly work with the community to get implemented.

[philips]

The first building block, STUN, is implemented over here: https://github.com/ccding/go-stun