The server side stuff is mostly done except for deployment. That mostly involves me writing a bunch of xsl. As required by the spec we'll still support jca 1.0 connectors. At the moment this stuff is only in jboss 4.
You can probably deploy a jca 1.5 adapter by judiciously turning the various objects into xmbeans yourself: my plan for deployment involves doing this automatically. See the current jca deployment in jboss 4 for how this will work.