HTML5 is really starting to make some ground. With YouTube successfully using HTML5 for video, and iOS4 not supporting flash. If you want to be displaying video on an iphone, then you are going to want to use html5.

After diving in head first, I am a little worried about the non strict nature of html5, having used xhtml for a while, I really like the xml style of html writing and will continue to use this code style, because for me it is much more readable.

The audio and video formats were a bit confusing at first due to their codec issues, but I have learned ways to do audio and video tags so they degrade nicely even in older Microsoft based browsers.

The canvas tag I still have mixed feelings about, it seems like an awful lot of trouble to implement these things inside canvas especially when words inside canvas are not accessible to screen readers.

While I am excited about the new header, footer, and aside tags, i think that adoption of this particular set of features will take a while to pickup.

The idea behind having html markup replace some webform javascript is prettybadass, though until there are some better ways to change the display of these features, and better adoption of html5 form features, these will be reserved for those who are ok only working in a handful of newer browsers, and some of the interfaces being ugly and infinitely better looking in javascript.

That said HTML5 has an interesting feature set, which I am excited to use in upcoming projects. I look forward to native multimedia components, greater html5 browser adoption, and improvements in CSS to include these new html5 form elements.