Always when doing visual studio demo’s, I am having issues with a long list of previously opened projects. Not that I mind anyone seeing what projects i am involved with, but the screen gets cluttered, and its a lot harder to pick the right project for your demo.
After struggling with this for quite some time, I came across a great little tool that allows you to delete selected projects from the recent projects list. The tool can be installed as an external application in the Visual Studio Tools menu. When opening it, it will let you select the projects you want to delete from the list:

You can find more info about this tool here: http://www.dotnetscraps.com/dotnetscraps/post/Visual-Studio-8-More-control-over-Recent-Projects-list-in-Start-Page.aspx