The LiveGrid tutorial has been ported on Pow.

Pow is a tiny Firefox add-on, that turns it into a webserver serving
dynamic pages (javascript being the scripting language) and giving
access to an sqlite integrated database ...

Pow is available at:
   https://addons.mozilla.org/en-US/firefox/addon/3002

and the Pow's Livegrid demo is presented here:
   http://davidkellogg.com/wiki/Pow-LiveGrid