Google Now Indexing AJAX Content
Google has just announced that it is now able to crawl content loaded by asynchronous requests in many situations.
Just before the announcement, Digital Inspiration noticed that Facebook comments on TechCrunch were being indexed. Prior to Googlebot's new functionality, searching Google for the content of these comments wouldn't have returned the article that they were attached to. These changes should also allow other third party commenting platforms such as Disqus to be properly indexed as well.