The most succinct summation of my thoughts on the World of Warcraft player-gouging news:
Since people who actually form their own groups are likely to be the more social players anyway, Blizzard effectively will be going the opposite way from Valve and charging the people who most want and are able to build social networks for their friends.
To get up to speed in one corner Blizzard who wants to charge people to play with friends in different servers, and in the other corner Valve who wants to give more free-benefits to those that are more socially influential. N.B. players are also charged a subscription for accessing Blizzard’s servers; what extras that subscription is paying for any more, I am not sure.