Yes, Microsoft has started the automatic roll-out of IE7. While IE 7 has been available as download now for several weeks, they have started pushing the upgrade via the OS automatic update utility as of late last week. Their plan is to have the roll-out completed within 3 months. I personally think this is a bit ambitious, but the reality is that by the end of Q1 2007 the majority of IE users will have been upgraded to version 7.
What does this mean to you? If you haven't done so, start testing your web site(s) and any web based applications to ensure they work with IE 7. If not, time to start fixing them before the clients start calling.
For more information on the rollout, read the following article from Yahoo News http://news.yahoo.com/s/pcworld/20061113/tc_pcworld/127851