maximillianos - 12:43 pm on Feb 23, 2009 (gmt 0)

We offer both ways to subscribe to our newsletter (email or RSS) using Feedburner. I'd say 95% choose e-mail, since most of our users are older, every day janes that don't use RSS readers, or even know what one is.

Bottom line, you can and should allow both. Plus, Feedburner does allow you to see "who" signed up via your email list, so you do have that information.