I love free stuff! Especially if the free stuff has real value. How does 24 hours of free training on Exchange 2007 delivered by one of the worlds leading experts on the subject sound. Harold Wong originally delivered these as a series of web casts and has now made them available for download. You can find the links in his blog here. Harold is a good friend of mine and does a great job of walking you through Exchange from beginning level stuff to really advanced detail. If you are interested in Exchange, or if you administrate an exchange server this series will prove to be incredibly valuable. There are some other great interviews on Harold's blog with some of the Exchange product group that are definitely worth viewing.
Thanks Harold for making the series available for download, I especially love the price!