RadBlock writes "Microsoft Watch has a story on a recent change in Microsoft's shared-source licensing... I guess the main difference is that programmers do not have to send back any changes made to the source code. But they can't combine any of the Microsoft code with other software. Here's the full text of their new license agreement."
The article claims that Microsoft is "inching closer -- at least in spirit -- to the GNU GPL" with these license tweaks, but it doesn't look that way to me.