I have loved solarwinds tools for many years now and i was delighted to see they are now extending their toolkit with a free wsus diagnostic tool.
It looks nice, repors what needs reporting and it’s 100% free!
http://www.solarwinds.com/register/MoreSoftware.aspx?External=false&Program=12060&c=70150000000PS0q&CMP=SYN-X-MYIT-WSUSFT_Launch_2012-WSUS-DL