(Um, totally clueless here.) Any chance you could tell me what that means? :huh:
The Google toolbar shows a PR graph (a green bar) indicating the PR for that page. A grey bar indicates that the site either a) is not indexed by Google or b) has likely been banned or penalized.
However, toolbar PR has been really flaky lately, showing grey and white when the page still has PR so you can't really use that to assess anything.