Drag the <a
href="javascript:{if(location.hostname==='gist.github.com')window.open(location.toString().replace('s://gist.github.com','://bl.ocks.org'));void(0);}"
>bl.ockalize</a>
bookmarlet to your bookmark toolbar.<br>
You can then click on the bookmarklet at <a target="_blank" href="https://gist.github.com/thedod/4548858">a gist's page</a> to view it via <a target="_blank" href="https://bl.ocks.org">bl.ocks.org</a>.<br>
Neat. Eh?