There's been a fully compatible Windows build of CouchDB shortly after every source release, since the initial 1.0.0 release over 18 months ago. You can get this directly from the Apache CouchDB mirrors http://couchdb.apache.org/ now.
NB the embedded test suite is actually for developer testing; due to subtle timing constraints not all tests will pass first time round on every machine. In the next release of CouchDB, the tests will be done outside the browser which will be both simpler and more robust.
Please up-vote this so we have the right information to hand.