Flushing footer to bottom of the page, twitter bootstrap

I am generally familiar with the technique of flushing a footer using css and the following approach - http://od-eon.com/blogs/calvin/flush-footer-css-bottom-page/

But I am having some trouble getting this approach to work for twitter bootstrap, most likely due to the fact that twitter bootstrap is responsive in nature. Here's a web app I am working on, using twitter bootstrap and I am not able to get the footer to flush to the bottom of the page using the approach described in the above blog post.

See
http://bokxy.com
and
http://bokxy.com/404

The "404 page" shows that the footer is all the way high up the page when the content is sparse.

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