Although search engine indexing is not directly related to HTML5, since you are coming from a Flash developer's perspective, it is definitely worth noting. Many search engines have become increasingly better at parsing Flash content for search engine results, but at the end of the day, creating a full Flash site will require you to perform some work around to have your content displayed properly, when someone attempts to search for it. Search engine bots will have a much easier time reading your HTML5 projects as they have a more direct approach to reading the important data about the pages on your website.
With the growth in what HTML element tags may now contain, the ability to tag specific elements on your site, specifically for search engines, is a new and exciting way to optimize your website's search engine optimization. One of the key aspects of web content the Google search engine is looking for in recent years is content related to authorship. For...