Your first point is not correct. Crawlers can crawl JavaScript only websites using the Ajax crawling API: http://code.google.com/web/ajaxcrawling/docs/specifica

Your first point is not correct. Crawlers can crawl JavaScript only websites using the Ajax crawling API: http://code.google.com/web/ajaxcrawling/docs/specification.h.. http://code.google.com/web/ajaxcrawling/docs/specification.h.... This sounds like a huge imposition to implement -- so much so that I seriously doubt anyone will bother for anything even moderately complex. Not only do you have to produce an API for the client-side javascript to call, but you also have to render static HTML for Google to index.