Follower mechanics have been expanded. They now accumulate experience points. More traits have also been added, and followers have a status (Fresh, Exhausted, Injured, etc). The task system is now fully functional and more kinds of tasks have been added, so it’s not all just archery and debauchery.
Going to add more tasks in the coming updates, as well as more varied rewards, task chains, and the ability for heroes to join in on the task fun. Followers being able to become heroes, and integrating the hero/follower systems is also on the drawing board.
WinXP users get .NET 4.0: http://www.microsoft.com/en-us/download/details.aspx?id=17851 instead of 4.5 (which is not compatible with XP).