Hi all , I finally managed to create an rpm for the new version of couch.
If anyone is interested to give it a try , here it is the links:

http://dl.dropbox.com/u/18808916/couchdb-1.2.0/couchdb-1.2.0-2.el6.x86_64.rpm

http://dl.dropbox.com/u/18808916/couchdb-1.2.0/couchdb-debuginfo-1.2.0-2.el6.x86_64.rpm

http://dl.dropbox.com/u/18808916/couchdb-1.2.0/couchdb.spec

There are some problem with the service and you might need to delete couchdb user and group.
If someone is able to improve it , please let me know.

L.