Login, and click on settings, then on permissions. Under permissions, you should have the option of selecting who can view the blog - anybody, only these readers, or only blog authors. I have "only these readers" checked, and then you'll have the option to "add readers." If you click on "add readers" it will ask you for e-mail addresses of anyone you want to send an invitation to. Does this make sense? Let me know if you're still having trouble!
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Yep, you can add people whenever you want by clicking on "add readers" and putting in their e-mail address to send them an invitation. I think there might be a limit on how many readers you can have, but I haven't reached the limit (probably because no one wants to read my blog! ).
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Re: Blogger/Blogspot users
Tyler Anthony arrived on 9.21.09
The Chronicles of Justin and Tyler