I bought one and then called to activate it and there was no hassle. I went through Tech Service vs. a CSR - they are generally a better bet for several reasons. I think a lot has to do with how much change is needed to the rest of the system if any (I already was an HD customer) and how well they think you know what you're doing based on your apparent understanding of the equipment, etc. In my case I didn't need to change any of the peripheral equipment, just rearrange two other receivers. Since they were getting more monthly fees out of me with this activation that may have helped grease the wheels, YMMV. I made my move in May. As RandallA mentioned, things may have changed since then, but I also agree that if you try again you may have better luck. Check with a techie...
I wouldn't use this as your only reason to buy the 622 vs. leasing it but if you were inclined to buy one anyway this is the time. DishStore and other retailers will probably ship it anywhere you want. What other equipment do you need? If you need an additional or new dish and the works, you might still want to consider leasing it and letting the professional install it for you because you can get the rest of the equipment included in the deal that way.
Good luck with it...!