As expected, the ideas I recently wrote about have been implemented (and perhaps already had been before I wrote it). There are at least two “Top friends” applications out there, and two “poke” alternatives, and an adoptable pet application. A search reveals that someone seems to be working on a gift app too. I expect to see lots and lots and lots of duplication and competition in there.
Meanwhile, I suppose I should get moving on putting my own pets into Facebook, even though I have a couple of other priorities first. Perhaps I should shift my priorities and focus on Facebook while things are still exciting? Hmmm!