Because I looked in the wrong places first, I found out I can actually announce the release of the Celtic Reconstructionism FAQ. I was one of the eight people who did a bit of blood-sweating (admittedly not as much as others) over that, and it's good to see it wrapped up and live. People have wanted a CR 101 book for years. You may consider this to be it, at least for now. There will be a hardcopy edition sold via Lulu.com in the near future. And since Manannán mac Lir has been considered to be one of the major movers amongst our gods to get this tradition off the ground, we chose this day to do it. I can only hope he is pleased with the results of our labors.
ETA: Since Jason Pitzl-Waters' choice of words about my relationship to this in his blog post might mislead some people into thinking I'm claiming more than I should about it, I want to note that the primary co-authors are Erynn Rowan Laurie, Kathryn nicDhàna, Chris Vermeers, and Kym nì Dhoireann. The rules of UPG I posted here a few months ago are included, and I wrote some or most of a few of the answers as well as inserting bits here and there in several others and acting as one of the "some people" in the answers where variations in patterns amongst CRs are noted. That last position was held by pretty much everyone on the project at some point, of course.