I have been resisting this for a little while but was finally convinced by Gareth, the Windows Server product manager.
Xobni is positioned as an add-in to Outlook that helps organise your flooded inbox. I wasn't convinced until I actually used it.
Yes it helps me find the latest conversations by email or Communicator that I have had with people, but Vista Search can do that and does it well.
But what it does tell me in addition that I find very cool:
1) The ranking of the top people by volume that email me2) The ranking of the top people by volume that I email3) The time of the day that I am most active4) Phone numbers from emails pop into the sidebar for easy access
Xobni System Requirements:
p.s. Well done to those that spotted Xobni is in fact Inbox backwards