Google bought FeedBurner fairly recently and it looks like there's a pretty clever reason. FeebBurner is used by almost every blog to manage their RSS feeds, since Google now has the ability to see when you've updated your blog they can crawl and index it quicker, and more accurately than just checking it every five minutes for updates.

The Google Operating System blog did a little experiment and found that Google now indexes blog post in almost real time. In one of their experiments it took just 11 minutes to have the new post indexed and on search results. That's a vast improvement from back when it took weeks for Google to even realise that you had updated your blog.

It might not be just FeedBurner, of course. Google could be listening to (read: crawling) Technorati more and indexing all the links from there (though, Technorati also uses RSS feeds, so most likely FeedBurner stuffage, once again).

So, switching to FeedBurner was a good thing for this blog!