Do readers have to register with FeedBlitz to get updates?
No. A reader subscribes using a signup form on your web site or blog, or by accessing a custom link to FeedBlitz’s free hosted sign up form. This automatically registers them if they’re new, and generates a random password for their account. The user responds to the mail and that’s it – done. Registration is required for new publishers – except for those using FeedBlitz from the FeedBurner GUI.