Today at SMX West, Maile Ohye from Google confirmed that Google is indeed now crawling AJAX pages that use the standard proposed last Fall. The documentation is live on Google Code and you can also take a look at my recent article about how to implement the standard and its pros and cons. Maile mentioned that the Google Web Toolkit team is eager to help with any implementation questions over at their community forums.
If your site uses AJAX and have uncrawlable URLs due to a hash mark (#) as part of the URL structure, this implementation is likely worth looking into.
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