From the "we-don't-say-enough-nice-things" department: I screwed up my Amazon.com order by leaving off the suite number of the destination. After noticing on the package tracking that that there was a problem, I went to the UPS website and got more information, then called the UPS number. Once I got past the initial menu which didn't really have the options I wanted simply by waiting (though I could have pressed 0 as it turns out), the process of changing the address was as slick as could be. I immediately got an operator, I said what I wanted, gave my tracking number with no hassle, gave the address correction, and that was that. I dreaded doing it over the phone since I figured it'd be a horrific hassle, but it was as smooth as you could hope for.
Kudos to UPS.