The sources all seem to be sitting in https://github.com/membase/ -- they are componentized, so may be... interesting to work out how to get a running server, but it seems to be there :-) ep_engine looks like the heart of it.
https://github.com/membase/manifest
Packaging isn't quite as awesome as I'd like, but all the parts are definitely there.
A tangential question:
Can i still replicate a couchdb database with a couchbase server. Is this documented somewhere?
It's written here http://docs.couchbase.org/couchbase-manual-2.0/couchbase-int...
Also, "Almost all of the HTTP REST API that makes up the interface for communicating with CouchDB does not exist within Couchbase Server. The basic document operations for creating, retrieving, updating and deleting information are entirely supported by the memcached protocol."
Querying views and map/reduce functions in Couchbase server will be similar to CouchDB except the output will be slightly different.
Personally, I've never used fetch-manifest.rb (even on my mac). Can you tell me what you did and how it didn't work?
cd couchbase; ruby fetch-manifest.rb branch-1.8.xml; brew install libevent; make