Furry, DaveVT31 replied he does not use SP.
UPDATE: I loaded firmware v1.31 (the next step up from my v1.21) and SharePort works now!  Note the "Check Online Now for Latest Firmware Version :" button never reported a newer version while I had v1.21.  Now v1.31 will report v1.32 is available when I click that button.  Maybe that should be reported to the firmware server's webmaster.
FW v1.31 also cured my wireless clients' connection drop everytime I closed the lid to sleep my laptop.  Seems the router no longer resets the wireless in an attempt to keep from losing my Intel Centrino Advanced-N 6205 adapter's connection as it goes to sleep.  All is good now, at least with my DIR-655 A1!