While not the biggest Joomla fan, I have to admit this would be a very handy Module for those of you using Joomla. You can find more info on this at http://www.promotionworld.com/news/press/070828Joomla.html
Yeah, it's a drag to change all meta description on the Article edit window. Althou i rather use metafly to generate "on the fly" meta descriptions Maybe not the best "SEO" technique, but for a lazy webmaster it's much easyer