Because of what's possible to do with Infocard in the Feb CTP bits, I know that only a subset of my readers have used InfoCard up to this point, but as the folks who got an interim build of Infocard at the Mix06 conference can tell you, Infocard = goodness.
I expect people will start experimenting with Infocard with the next community release of WinFX. In anticipation of that release becoming available, I wanted to make sure people had a single place to find the content currently available, such that you can be ready to hit the bits running.
Until my book comes out later in the year, this should help you get going. Trust me when I tell you that this stuff is going to be the way we handle identity on the web. The Windows guys love it, the Linux guys love it, the Identity guys love it, and most importantly the Business folks love it.
So, without further ado, this is my recommended syllabus to get prepped for Infocard:
First, get up to speed on the Laws of Identity and the Identity Metasystem.
From there, read David Chappell's whitepaper “Introducing Infocard“ which can be found here
If you want a little more background, you can read this other intro article or this article that goes a bit deeper.
Now if you're a visual person, and would like to see some videos, I'd recommend checking out my colleague Nigel Watling and Andy Harjanto's Channel 9 video here
Now you're ready to kick the tires and actually see this thing in action on your own machine.
You'll need the WinFX bits, which can be found here. Follow the directions in the section for developing WinFX applications.
NOTE: You'll need the post-February CTP bits to use Infocard in scenarios that involve a web browser (vs. services)
Check out Mike Jones article on using Infocard in a Web Browser, which can be found here. You can also check out Kim Camerons simple tutorial which you can find here.
Maybe now that you've used it, you're curious as to how the implementation of Infocard came to be. Check out Kim Cameron and Mike Jones' paper on Design Decisions here.
The folks at Ping Identity have put together a good whitepaper called “Integrating with Infocard“, which you can find here.
What about blogs for ongoing education? The two I read regularly are Kim Cameron's identity blog which is here and Andy Harjanto's blog which is here.