Good step-by-step instructions, Jon--thanks for posting.
For AnnieBee and anybody else who wants to give it a try, just go for it. For me at least it's been fun, easy, and (so far) foolproof. Jon's instructions will ensure success, but there are other methods people have posted about recently. The thing they all seem to have in common is that they work. Another post (I think it was also by Jon) suggested cutting off the top of the container and leaving it open so you can moisten the soil, just as you would water a potted fig--which is why I tried it on this one.
If air layers get time to produce a good bunch of roots, they can be pretty tough. One that I cut free recently got shade for about a day, but since it showed no signs of stress it went right back to full sun. Still no stress, and it's already ripened two figs with several more on the way.