Speed Up WordPress Using Google’s AJAX Libraries API
Google works directly with the key stake holders for each library effort and accepts the latest stable versions as they are released. Once we host a release of a given library, we are committed to hosting that release indefinitely. [...] We take the pain out of hosting the libraries, correctly setting cache headers, staying up to date with the most recent bug fixes, etc.
Or, in plain English, it should make your site load faster. It could also make other people’s sites load faster too, if they’re also using this plugin.
Any WordPress themes or plugins that load any of these libraries via enqueue_script() should automatically take advantage of Use Google Libraries.
Why not give it a try?
There’s nothing earth shattering here, but my goal was do one thing and do it well. You can read the documentation and download the plugin from the Use Google Libraries page in the WordPress Plugin Directory.