I once mailed a birthday card to my Mom in NE, now keep in mind I live in MN and can drive there in 7 hours, and it took it over 30 days to get to her.
Just a thought for swap hostesses. Maybe in addition to supplying an envelope we should also supply a large zip lock baggie with an address label. That way if something should happen and the originl packaging is destroyed our address is still on the contents.