There is an easy way to notify google, bing and yahoo whenever you add content to your site or blog. All of them expose a url which when called with your sitemap’s url updates their indexes. This fact is known to most developers, I just wanted to share a simple rake task, which automates this. I use it to ping these search engines whenever I write a new blog post.
All it’s doing is looping over all the search engines’ urls and using curl to ping them.