Yeah, I think so.  This article is a little simplistic.  Almost like a top 10 list.  But, the content is really good and the points are solid.  Here's the bottom line, if you have a popular eNewsletter I would start a blog and put the content of the newsletter there everytime to mail out, but keep the two publishing vectors paralell (for now).  Then start getting used to blogging, maybe add more content on the blog than in the eNewsletter itself.  Introduce your new "website"--I might hesistate to call it a blog, depending on your audience--to your readers.  Encourage them to put their comments there.  Then start giving instructions on RSS or receiving updates from your blog/website via e-mail.  See, here's the rub.  I haven't found (and if I'm wrong, please correct me) and really, really easy way to subscribe to a blog via e-mail.  Sure RSS is easier, but it's still a little geeky for most folks.  I wrote an article a while ago on how to subscribe to a Blogware blog via e-mail.  It's like 7 steps including waiting for an e-mail and a couple of login steps.  Not smooth.  Regardless of this snag, though, for all the reasons in the article below, if you have an eNewsletter seriously consider adding a blog to the mix.  I think you and your readers will be happy you did.