Duh! .Mac has been presented as a personal system since its inception.
Besides you can do much better for the money. For example, from Infologistix, web hosting, email hosting, domain hosting I get a Wordpress blog, forums, and an unlimited number of email accounts (as opposed to simply addresses) for spouse, kids, friends, etc., unique/killable email for each course/session I teach, etc., etc..... on my personal domain, with total control for $99Cdn/year. That's not the cheapest by a long shot but Buddy is local and I get SERVICE. It is their small business package, but works beauty for family use. A package like this includes some e-commerce support, so it has been very worthwhile for the family (if only for the separate private email addresses for the individuals) and has allowed me complete freedom to dabble in small businesses that may well come and go. I pay something less than $15Cdn for my domain, again not the cheapest but semi-local. That's $114Cdn for much more than .Mac offers - and on my own domain, to boot - with the advantage that I can call Buddy up at home if necessary or 'run into' him at the local watering hole.
Shop it around, and you can do better.