My family is so used to #. For most frequently used numbers, I've programmed 3 digit or 4 digit outgoing call routes, such that even with the # it's still shorter than 7 digit. Want to call the doctor? Dial DOC#. Call Mom? Well of course, MOM#. It's so easy.

(then again, my NPA has required 10-digit dialing on POTS for ages nobody around here remembers what 7-digit dialing was like).