"We spoke to Artbox today. The cards are on the way to us. We expect to ship
all Sorceror's Stone preorders early-mid next week"
Since that report was from Wednesday, it's possible that not all of the "east cost shipments" left Artbox last Friday or Saturday.
Potomac has usually been very good at turning around the pre-orders quickly. But alas, there wasn't any "shipment coming" message for me by midnight Wednesday, so for sure I'm not going to have mine by the weekend.
