Welcome!
Software that is promised but not yet created and delivered is called vaporware. But, since you’re reading this blog, it must actually be created. So, I guess it’s not technically a vaporblog. If I wrote about some as yet non-existent blog here, then that blog would be a vaporblog.
I’m read, therefore I am.
But in order to be readable this blog must have been written and posted first.
I’m written and posted, therefore I am.
And now I’ve written a blog entry, technically making me a blogger.