A very good friend of mine who is a professional presentation coach has started a series of workshops called The Charisma Clinic. (Which I heartly recommend, BTW).
While Hilari understands the benefits of blogging, she is still in the "I'll start a blog soon" phase. Right now she is relying upon newspaper articles to send business to her website. The inevitable happened. The initial article announcing the clinic was published with an incorrect url, pointing to a defunct website in Lebanon instead of the correct url. She's hosed and there's not much she can do about it.
This episode emphasises the importance of building your loyal following via a blog instead of the traditional media: control. It is unlikely Hilari would have published the wrong url on her own blog, and if she had, she could correct it instantly.
(BTW, If you are in the Phoenix, AZ area and you depend upon your presentation skills to bring you new business, I highly recommend Hilari and her workshop. It has certainly done wonders for me.)