Blogarithm: RSS for the e-mail crowd?

I’m not sure I get it. Via The RSS Weblog, I read about Blogarithm, which lets you know via e-mail that a blog you follow has updated.

Huh?

I do know RSS is not (yet!) for everyone, but I hadn’t thought there still was even a sliver of market opportunity for doing update notification via e-mail. But then I thought about my own behavior. I still sign up for e-mail alerts in certain circumstances, both because e-mail often demands action and because not all services yet offer RSS. So e-mail is definitely still lingua franca when it comes to information transmission. Still… for blogs, where RSS is a native tongue? Hmmm… didn’t we see this movie? Where’s Spyonit now?