It's important to note that, with Wordpress, hosting companies often provide a copy of Wordpress in your space, and maintain the latest versions for you (or give you a link to refresh with routine software upgrades). There is a difference, in terms of how TOS and customer support works, between this kind of full hosting (which is desirable), and merely equating a domain name on someone else's free space. I'll have to check and see exactly how the new Blogger domain names work in this regard. Another thing I would like to see all blogging platforms do is work cleanly with Microsoft Word (get rid of the unnecessary XSL), when the post is written off-line first. Wordpress actually retrograded in this regard.
Update: Mach 27
Nitecruzr on Blogger offers this explanation of redirection, not his detailed sublink and detailed examples.