16. The ‘border-style’ properties – I would add “pipe” and it would be a rounded (gradient) border lit from the top left. If “wave” caused any problems, I would drop it. You might consider creating “corner-type” where a corner can not only be rounded (as adressed elsewhere) but could be decorated in other ways… bulbs, clipped corners, an extended edge, or colored or transparent squares… etc. This might fall into the border image stuff tho. *shrug*
18. The ‘border-image’ property – To put it simply, thank you so much! 😀
20. The ‘border-break’ property – Awesome! This will affect me. I create many documents that go to print and it makes me sick when things get cut up.
22. The ‘box-shadow’ property – Not as important as adding drop shadows to text, but still cool. This will be used and abused for a long time to come.
The only related topic I don’t see covered is form elements – but perhaps that’s in another document. I bring this up in response to the background and border restrictions on elements such as radio buttons. However, given the scope of the topic – I’m sure it’s being addressed somewhere in the spec.