For my blog, I would like to use a domain for which I get the error “Sorry this site is reserved” (the address would be sfilip.wordpress.com). From browsing around support forums, it seems that it could be possible for WordPress Support to have it unblocked. Would that be possible?
I’m sorry but that’s not possible. When we register a username account the matching blog is reserved for our future use. It cannot be obtained by anyone other than the person who has registered the matching username.