[cldwalker]

For some context on how this has been tried before:

* http://yubnub.org/ - one of the first if not first to create a community around web commands. Primitive string substitution

* http://queri.ac (disclaimer: I maintained it for awhile) - a small community of web commands. Supported options, bookmarklets and more. Browser-independent.

* ubiquity, https://wiki.mozilla.org/Labs/Ubiquity, - improved on web commands by having them written in javascript and had an awesome API for combining commands and rendering command output. However, it was firefox-specific.

The main innovation I see with duckduckhack is that they're using github to foster contribution.

[tripzilch]

And that it directly adds to an already successful search engine.