I understand that Google Offered SEO Advice On AJAX Coding the other day that echos what others have been saying at SEO Conferences I've attended for some time now, especially at BigGreenBlog, in a post titled SES NY session: Optimize your AJAX for SEO:

"…Always build your baseline application so that it supports non-Javascript browsers (which essentially is what search engine spiders are). When you're developing your site, test it by turning off Javascript in your browser*, and then try navigating around your site. If you can still see and browse your site in a satisfactory way, then you're fine and your natural search rank will be okay. But if you get a blank or incomplete screen, or you can't browse between pages when you've got Javascript turned off, then you're in trouble because this is how the search engine spiders will see your site as well."

Google's guidence is pretty much a carbon copy on what is already been said:

"…The advice includes having HTML links for your navigation, ensuring that your site works on browsers that do not have JavaScript turned on, and using real links in your JavaScript or AJAX, such as:

<a href=”ajax.htm?foo=32” onClick=”navigate('ajax.html#foo=32'); return false”>foo 32</a>"

Not being a programmer I can't say the link above looks very real or not - but having Google, at least, give Guidance on Web 2.0 pages is a good thing.