FWIW ...
I have been using a fake jQuery for six months. But it only emulates the ajax calls through node requests. The reason I did it is so that code designed to run in a browser with ajax will work with node. In particular I am using it with the standard jquery client for couchdb. This has allowed me to run identical db code in the browser and node.
If you want to add my functionality let me know. I would have to do some work to make it general. Or you could just rewrite it yourself as it was pretty easy. Then I could use your supported version.
One quick note. There was one part of ajax that was impossible to implement. That was the sync version of the ajax call. I will never forgive Microsoft for including a sync version and I will not forgive the couch programmer for using it for one feature. I have avoided that feature in my app.