I use this daily and have been ask about it so here you go…
Xobni's Outlook add-in saves you time finding email, conversations, contact info & attachments.
With Xobni, all interchanges between you and a contact are instantly displayed as a list of email conversations. Emails are threaded based on their subject and are shown in the order in which they occurred. Xobni also conveniently shows you which conversations include attachments with the help of a handy paperclip.
No more looking for attachment sent by Anita just look up Anita and all the files you sent are on one page
PS XOBNI is FREE at can be found here