Trying to give something back to the Community...
When I load the ConfigMgr Administrator Console nothing is listed under the "Site Management" node.
Check to make sure that the account you are logged on with is a member of the local "SMS Admins" group. Also bear in mind that only the account that was used to install ConfigMgr gets added to this group. All other groups/ accounts need to be added manually post setup. [17/10/2012 - The WMUG Link Below No Longer Works - Please click HERE to access the Article]
Read the complete post at http://wmug.co.uk/blogs/cliffs_blog/archive/2010/08/04/faq-configmgr-07-quot-site-management-quot-node-empty-in-configmgr-administrator-console.aspx