What I do like about XHTML 2.0 is the introduction of the nl tag for navigation lists. Works like a ul, but semantically more appropriate for navigation -- which has fast become the preferred way to mark up navigation items -- then styling them with CSS. I had previously wondered if using a definition list was a better choice for navigation, but then was convinced that using a header tag and an unordered list was the way to go (mainly due to a cleaner un-styled presentation).
Now nl is thrown into the mix -- although it doesn't look like I, or anyone else, will be using XHTML 2.0 any time soon, if ever. So, maybe it's not worth getting excited about.
Excited over a proposed XHTML tag. Yes, it's come to this...