This project is no longer actively developed or maintained.
For new work on this check out Building an App Engine application with Go and App Engine hello world for Go.
Guestbook is an example application showing basic usage of Google App Engine. Users can read & write text messages and optionaly log-in with their Google account. Messages are stored in App Engine (NoSQL) High Replication Datastore (HRD) and retrieved using a strongly consistent (ancestor) query.