Don_Hoagie - 6:24 pm on Mar 22, 2006 (gmt 0)

Annej, have your usability changes also increased your SE rankings? Perhaps you are now being highly ranked for some terms you had never been ranked for before (and have no interest in being ranked for)... could be that new demographics are getting to your site for the wrong reasons, which would explain both the increase in traffic and the short sticky time.