Author of Martini here. It's very cool to see community members explain concepts better than I can! I'm very excited to see where the golang community can take this over time.
or even route filters. Those would be suitable for that Auth demo, it looks like a filter, but would also be nice to have a group for routes and filter over those.
Really nice. Some of the stuff happening in Go for web services is awesome.
However I would like to see someone develop a library for doing RESTful APIs that does some of the repetitiveness in implementing REST properly for you.