You can check out the plugin page for more information about the releases.
Current bundled JsTestDriver version: patched version of JsTestDriver-1.3.5.
You can find features that we are planning to implement in the future on the Roadmap page.
If you've found a bug, a glitch or anything that doesn't work well, please file an issue in the WebStorm /PhpStorm project issue tracker (select "Plugin: JsTestDriverUnit Tests" subsystem).
Please don't file an issue in the http://code.google.com/p/js-test-driver/issues/list?can=1&q=label:IntelliJlabel%3AIntelliJ. Those bugs are handled normally, but it's an old way.