Things change rapidly in the WordPress world. The content in this post is more than a year old and may no longer represent best practices.
At the time of this meetup, WordPress 3.3 was in Beta 2. As I upload the slides, it’s reached RC1, so it may well be available by the end of the year.
For some features I missed in the slideshow, see Aaron Brazell’s post, 10 Things You Need to Know About WordPress 3.3.November 2011 Slides: WordPress 3.3 Feature Tour