These are all great ideas!!! I think you're absolutely right that getting a 1.1.0 release that's Solr4 friendly should be our #1 priority.
Nick's working on contacting providers to get us access to a hosted Solr4 server that we can run tests against. While Nick is doing that, I'm doing:
Based on SemVer (http://semver.org/), 1.1.0 is the proper next release - right?