Article on configuring caching to speed up your MOSS sites:
http://blogs.msdn.com/ecm/archive/2006/11/08/how-to-make-your-moss-2007-web-site-faster-with-caching.aspx
MOSS Performance – Configure Caching
http://blogs.msdn.com/ecm/archive/2006/11/08/how-to-make-your-moss-2007-web-site-faster-with-caching.aspx