This would mean that I'd have to start again from zero on the blog's Technorati and Google rankings, as they are tied to the current URL. But the Blogger site's ranking would still help pull in readers who would find a re-direction link to the new site. Which would in turn attract more traffic than the old site simply by being where it is. So reaching the current rankings again would most likely not take a whole year.
Another question bothered me more. Would they make me change my blogging habits? Perhaps ask me to write more about this and less about that? No, apparently not. They want me to continue doing what I do.
And then there's a money issue. These people would stick ads on the blog and make a small profit off it. Would any of that trickle down to me? Apparently yes. Certainly not big money, but getting paid at all to blog would be pretty neat, don't you think? And blogging at the new place would mean greater visibility and thus possibly generate revenue indirectly through speaking engagements, review copies and promotional freebies.
So you can see why I'm excited. I'll let you know more when things solidify!
[More blog entries about blogging; blogga.]