I know, it’s an old topic but I’m sure that this article written by Kyle Larson can still help somebody.
An interesting article about Google UriBeacon of Steve Statler that you can read in the always interesting website www.gpsbusinessnews.com.
Another interesting article from the NN/g Nielsen Norman Group, Hoa Loranger explains how to wisely approach the redesign of a website. I really suggest you to read carefully this article, before to start to change your old website !!!