With regards to building erlang+couchdb, there is this note in an early version of the CouchDBX README:
Get http://github.com/janl/couchdbx-core/ and compile it. Copy the resulting `couchdbx-core` folder into the top level dir of this project. Launch Xcode and build the app. The last commit here was 2 years ago, so I don't know if it's still useful — I will check it out later but if someone can get it building with the latest versions then that would be cool. C.
