Please make this into a Chrome extension or FF add-on though.

I know myself, I'll forget to click the bookmarklet...

Use this: http://sandbox.self.li/bookmarklet-to-extension/

Would you be any more likely to click a toolbar button? If you mean finding threads automatically, wouldn't that have privacy implications as it would have to send every url you visit back to them?

I am also not doing any GAE stuff, its just some static files. Presently all things are happening on client side.

Actually I also thought of integrating Metafilter, but they don't have JSONP api as of now.

Anyways will opensource it soon, and can integrate other sites with serverside component.

Thanks!