Gmail does have a business version. I have a few clients that use it and I use it for one of my business accounts. I don't know if it went down too, but it's unrealistic for people to expect it to be up all the time. Stuff goes down, needs fixing, if it's that important CALL the person, otherwise, save the email or pre-write some and send them when it comes back up. *laugh*
But yeah, I hate it when my email goes down. Makes me a little crazy