[ilcesco]

Mark Pilgrim's site http://diveintohtml5.org/ is the best resource I've found on the subject. Once you have an overview of all the new features, you might just want to read some examples and start playing with them, at least this is my approach (I'm not a big fan of programming books, can you tell?).

[amk]

This is probably the best reference for those who want to learn what is new in HTML5 if they already know HTML. It is not just a quick start guide. It is a very good read and explains stuff very well.

[dawgr]

I'll have a look. Thank you.