Man, I can't begin to tell ya... Imagine working twelve hours straight, boxing up orders, printing out labels and customs forms (to the tune of $5k in UPS fees), scheduling that pickup for the next morning (your customers having received "Your order has shipped!" notices), going home and going to bed.
Next morning, you call UPS "You're making that pickup, right?" "Oh yes, of course!"
3pm rolls around "Are you sure you're making that pickup?" "Umm, sir, there is no UPS service at all in Houston right now."
We got a local store to take our air and international shipments if we drove them to them, but no one would take the ground shipments until Monday, and then it took 'til midnight on Monday for them to update status (status updated to: "Extreme weather circumstances, delays beyond our control.") -- 75 emails later, and the customs are still freaking out *sigh*
... I aint touching USPS - all we got for four hundred boxes shipped through them was four hundred nightmares. I'll take UPS's shipping delays due to ice any day, over a package saying it "left the US" four weeks ago and no updates since then.