Oh, finally. I’m one of the first.last@gmail folks, which I assumed would never change when I was 13 years old (hah!). Fast forward a few years, I got married, and am stuck with my old name in the address.
I have a first.last email, but it's created quite the interesting situation. Turns out some dude in Australia has the same first+last name as me, and he's been using firstlast@gmail.com. As far as I can find from Google's documentation, the email with no dots should be the primary and the one with dots an alias, but I'm guessing because I registered mine ages ago (back in 2006) it takes precedence. I have no idea how…
I had to give up using the address.