I have found this comparison of RDF/RDFa and micro-formats really helpful. http://manu.sporny.org/2011/uber-comparison-rdfa-md-uf/
Jetpack is in no way new… But I have never installed it (it seems that half a million other people have though). The only service I have used from Automattic is akismet. Then about a month ago I installed after the dead line as a Google Chrome plugin to help me with my spelling mistakes. It seemed to work so I thought I would give it a go as a WordPress plugin.
What was new was that I had not integrated a
sharing solution for readers of my blog. So as of now there is a share this option at the end of my posts.
To add delicious I followed a post by Ryan Markel to find the right share service URLs.
The other thing I figured out this week was how to use the Menus Feature under the Appearance tab. I have been using K2 since 2005 and have always thought that the menus in the default theme were sufficient. I have usually not had complex menu desires. So there was no real need to learn these new features, however. Now I wanted to put several picture pages under the same menu. So wal-la. It is done now.
(Mostly RDFa and HTML5)
I also have a plugin that is adding Open Graph RDFa tags to my theme. My current version of K2 is HTML5 but, it is not validating with the RDFa tags in it. So I was trying to validate them but have not been successful. I looked at this answer which said to add something to the doctype. But then there is more answers too. Sometimes these answers are beyond me. I which I had some structured learning in this subject area.
And RDFa is the basis of Open Graph, the technology used to sync FaceBook
Likes between my site and FaceBook.