You guys should checkout: http://thinkst.com/tools/cr-gpg/
We do the some thing, but hook into the DOM to blend it into the interface.
(we have users across win/linux/osx so its been doing pretty well considering its hacky birth)
I'd love to see a mashup of the two. I trialed cr-gpg, works fine, if a bit clunky at the moment. I suspect this is a much better way to interact with gpg though (+ --use-agent, etc.).
