Microsoft running Linux

This box has been up for a bit, but suddenly a huge flood of folks have started having interest in it. I guess I'm not surprised- there has to be a few boxes running linux inside of microsoft.com, but it's kinda interesting that they made it available from outside. Is something coming? Or are a few cool employees (I know we have plenty of MS Slashdot Readers) inside the halls of redmond just having fun?