In response to Ben's call for book ideas
Not your usual here's how to mobilize your companies business process applications. Instead a look at using Domino to host a twitter integrated, location aware application fit to run on Android, iPad and iPhone.
1) What's new in HTML5 elements and use them practically in the application;
2) Enhancements to CSS3 including media media queries (we'll change the layout depending on screen orientation)
3) Twitter integration (with Java, with PHP)
4) Configuring the Domino server to mask the .nsf in url's
A practical example might be to build a twitter application for keeping abreast of Lotusphere tweets, we could show the location of tweets on a map.