Google has a service called Google Tip Jar that allows people to share information and tips.  They have a Finance category where people share tips for saving money and dealing with your finances.  The Tip Jar is powered by Google Moderator software, which allows people to vote upon and rank the best tips.  Ideally, the best and most effective tips will rise to the top of the list.

See:
http://moderator.appspot.com/#15/e=3cfc&t=16fdf