Picked this up at CostCo in Cypress, since, for whatever reason, it's not at the local one in Richmond, CA.
(Update: ok, it turns out that Richmond does have it. It was just in the locked case.)
There's a free support number, 888.822.9299, for Costco members, 24/7.
First step is to print out the settings from the old Netgear WGT624 router.
Update: no sweat setting this up and making it operational. I need to do some refining on the settings, though.