Microsoft has just released part one of a 3 part series deployment and maintenance guide for IE7. In their words:
This is the beta 1 release of the Internet Explorer 7 Deployment Guide, and contains only the first of three parts. Please submit feedback to IEdeployfb@microsoft.com.
This guide helps you to plan and carry out a deployment of Microsoft Internet Explorer 7 on Windows XP and Windows Server 2003. The guide describes the system requirements and deployment methods, as well as the techniques to maintain and support Internet Explorer 7 after deployment
Speaking from experience, IE7 deployment with WSUS was both silent and pain free. I’ve been using IE7 since last Spring and have loved it. Tabbed browsing and the RSS reader have been great additions.