The RPM information for the couchdb package lists http://incubator.apache.org/couchdb/ as the URL. CouchDB is a top-level Apache project since November 2008 and now has its website at http://couchdb.apache.org/. Should be a one line change to the SPEC I guess.
Fixed the link in cvs. I haven't done a new build however since this is a very minor change. Will be pulled in as part of the next update whenever that is needed. Thanks for the bug report.