Cool!
Actually, my reply was not entirely correct. Some months ago I facilitated for another forum member who then arranged for BikeFlights to collect a box from my front porch. All I had to do was print the label, pack the frame, and leave it on the porch.
Easy. But I didn't deal with BikeFlights at all, so I can't claim any experience with them.
Well, there's not much more to it. To create the label, you go to bikeflights.com, fill in the from and to shipping town, dimensions and weight of the box, and you get a quote for various shipping options. Select one, then you give them addresses for both ends, pay online, then they send you an email with the label.
The front end of the website is nicely done. For the quote you don't need all the info. On the backend, you can save some money by dropping off and/or picking up from a Fedex site. Note that most of them used to be Kinko's/Fedex, so most of them are conveniently located in shopping centers. When I go in and show them I have a box with a shipping label on it, I can just drop it off unless you want a receipt, which takes all of 1 minute for them to provide.