The Gotham Gal has some [choice words](http://gothamgal.blogs.com/gotham_gal/2005/08/amazon.html) for Amazon about the switch from UPS to USPS. I echo the sentiments.
I’ll give credit to USPS for recruiting Armstrong to [win the Tour](http://www.trekbikes.com/tour_de_france/team/lance.jsp), but package delivery is not one of their strong points. Buying online is not just about the price, but the convenience, and UPS is part of that package (no pun intended).