Web 2.0 Applications for Library Website

As part of the 23 Things exercise, a Web 2.0 application that might be useful is a future Google Map application that shows all of the recently constructed public library buildings in California. The map could show a photo of each library and be linked to other photos as well as basic information about the recently constructed building. It would also be useful to provide RSS feeds from the website so that any time additions or changes were made to the map or website material, interested users could be notified of those changes.