With Gmail’s on-and-off outages this week garnering quite an outcry from net users, you might think everyone but your Aunt Marge is using Gmail’s web interface. PC World runs down Six Reasons Desktop E-mail Still Rules. Among those we (admittedly Gmail-positive) can relate to: better filtering and rules, drag-and-drop attachments, and the “Redirect” command. What advantages does your desktop client have over webmail?