[pauluffel]

I'd say firstblog.net, as this will be just a large network of people, and I think charging people would be very valid for extra storage space and so forth, but I think it would be best to keep it free and offer a mb or two to each account for storing personal stuff (pictures and so forth, text would not fall into this) or just letting each personal account store one photo at a time and have anyone who wants more rely on something else (at least until this becomes incredibly popular and we can have people donate more things when we need them just because everyone will love the site so much).

As to team blogs, the only thing I can think of to do differently would have multiple people allowed to contribute to it and one "admin" per team who would be given ultimate control over their team page (and possibly a different layout, like multiple columns, so different people could post on the same horizontal position).