To coincide with the first birthday of Exchange Server 2010, Scott Schnoll from the Exchange Server Team Blog has put videos on high availability online. The video consists of 4 parts and is available here. Anyone planning or using a highly available Exchange environment would be well advised to watch the video. If you are interested, here is the link:
http://msexchangeteam.com/archive/2010/12/15/457173.aspx
