Pramas
Explorer
Fast forward to the present, WotC probably now sees the DDI character builder as a very useful "weapon in their arsenal" for tightly controlling the use of their D&D intellectual property, without ever having to make a strict 3PP license.
I'm guessing they are much more concerned about another unintended side effect of DDI: the strangling of their own book sales. This has become a real problem for WotC.