We also have a Google Group for driver developers (https://groups.google.com/forum/?fromgroups#!forum/rethinkdb...) that you can always ask questions on.
Thanks for working to build a Scala driver, I'm excited to see it!
https://github.com/rethinkdb/rethinkdb/wiki/Community-contri...
Every time I see an announcement from RethinkDB I get excited to try it, and then I see there is no driver for Java/Scala.