Amazon has announced HTML 5 support in the upcoming Kindle Format 8. Kindle Format 8 (KF8) will replace Mobi 7 in the Kindle Fire and eventually the entire Kindle line of eReaders. Amazon has a complete list of KF8 enhancements here.
For me the main excitement is the fact that my very HTML centric method of producing eBooks is likely to benefit greatly from the move to what appears to be a very HTML 5-ish KF8. In particular, making a graphics heavy book like The Great Robot Adventure, which presented a great challenge to publish on the Kindle, should be a lot easier in KF8. I can’t wait to put the CSS3 and Scalable Vector Graphics support to the test!
As Amazon gears up to launch the Kindle Fire in a few weeks, moves like this, lowering the barriers to publishing great content, can only tighten their grasp on and dominance of the eBook market. One begins to wonder if anyone else can stand against the Amazon juggernaut for much longer.