I recently switched to Blogger Beta. I didn't know what it was about but figured "hey, maybe it's an improvement".
It's got 2 more whistles than regular Blogger, that's about it.
The problem is, IF YOU HAVE REGULAR BLOGGER, YOU CAN'T POST A COMMENT ON MY BLOG, AND I CAN'T POST ON YOURS.
However, THERE IS A WAY AROUND THAT. Just post as "other" or "anonymous", and you can post a comment.