Our Development team is planning to make our website nearly 100% AJAX and JavaScript. My concern is crawlability or lack thereof. Their contention is that Google can read the pages using the new #! URL string. What do you recommend?

[DavidChase]

Discussion around AJAX implementations and if anybody has achieved high rankings with a full AJAX website or even a partial AJAX website.

[john4math]

It can be done.  Make sure your development team reads through http://www.seomoz.org/blog/how-to-allow-google-to-crawl-ajax-content and http://code.google.com/web/ajaxcrawling/ before coming to any conclusions.  If you have an AJAX based website, you'll have a little extra work to do depending on the route you take.