I've updated HappyHour (a google gears enabled container for testing gadgets locally) with partial 0.7support using the latest reference scripts from Apache's Shindig project.
http://code.google.com/p/happyhour/ (downloads available)
You can see OSChecker running here:
I hope you find HappyHour useful -- it's made offline development easy for me. All the credit goes to Chandra for the initial .5/.6 plumbing.
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