First, let me answer my own question, posed more than twenty-six months ago:
For reasons 2, 3, 4, 5, 6 and 7. Somewhat for reason 8. And not so much for reason 1.
I've taken the time-off (an odd way of putting it, admittedly, since the original blog only existed for two weeks) to write a "neo-clone", Seven Voyages of Zylarthen, which I'll be releasing in a few days.
I started with a desire to write a pseudo-16th century variant of OD&D, but that gave way to a potentially richer re-imagining of the original game, with more of an emphasis on its fairy tale and even pulp science fiction aspects. I wanted to create something that even my new children could enjoy (in a few years, of course). The original idea is being reworked into a "supplement".
This blog will exist as a portal to the game, and as an occasional space to pontificate, but I doubt I'll have a lot of time. My wife and I are preparing for the arrival of two more children. We've gone from 0 to 4 in a bit more than two years, with me starting at the age of almost 48. That's two sets of back-to-back twins conceived through "natural" means. The odds of that are a bit higher than qualifying for an AD&D Paladin by rolling 3d6 in order, I think. :)
Here are Oliver and Lydia, riding the Chicago "L" on the way to Mass at our lovely St. John Cantius. They were no more than two months old when I took a hiatus from the blog. God willing, they will have two new brothers no later than the first week of May.
Thank you to those who followed and commented on the early posts, and apologies for letting you down in any way. I've noticed that at least one of those commenters, Zenopus, has gone on to be a major player in the blogosphere, offering all sorts of nifty stuff of historical interest.