I've been a Blogger.com user since August of 2002. I've used it fairly regularly to update my blog
I logged on a couple of days ago and they asked me If I wanted to try Gmail. I've heard if you log on to Blogger just to get Gmail that it won't work - that they are only accepting "regular" users of Blogger. I don't know if that's true or not.
I have screenshots of the Gmail system available here