Here is the scoop:
The Today Show interview will be tomorrow, Tuesday, September 9th. It will be live on the east coast at 7:00 a.m. (4:00 a.m. here in AZ... good thing my parents are early-risers), but it will be broadcast at 7:00 local time (where ever you are) so tune in.
UPDATE: Looks like my parents wiggled their way out of this one, and now just the Clarks (Stephanie's family) are going to do it. :)