Mine is on the truck too. I got two day shipping, so maybe that's why it's coming on Saturday. For people upgrading their phone, I don't know about the activation. But I'm coming from Verizon and the Epic is already activated (it automatically activated yesterday, which cut off my Verizon service. I need a phone!)
Similar here, just switched from AT&T to Sprint for the unlimited data. Speaking of which, just got my phone delivered!