Interestingly, I'm getting a lot of e-mails asking for advice, recommendations and guidance in self-publishing e-books... more than the sales I've made on the article. I hadn't really expected that. Quite a number of questions I have referred to this site, or TeleRead, after giving them my 2 cents' worth. But it seems the biggest impact of the article so far is that I am becoming better known for my technical knowledge on e-books, than for my writing.
I'm still trying to decide how good a thing that is...