Also see item stock status
for how quickly they can ship items based on its stock status. They do mention "business days" so Sunday may not be included. I think they do have some staff on the weekends but perhaps not for shipping.
I do know how it is to be waiting for something good in the mail. =) You try to ignore it but you can't help checking...
Edited on 5/15/2013 at 5:42 PM. Reason:
I am Not a FastTech staff member.