Mailing the story:
Microsoft stuck at top of open source incline
When you have to pay people to do your open source development, even development that is in their interest to have done, you are naturally going to take a proprietary attitude toward what results. You may indeed wonder what the excitement of open source is all about - is it just taking your work for nothing? It's not, but Microsoft has never gone far enough down the open source incline to know any different and I wonder if it ever will.