[twobob]

Hmm. well
a) to get software you wouldn't need to amend the kindle in any way, it would be your internet connection. going to store - Buy:

BUT TO: deliver to device - I do not see how we could fool the delivery mechanism to go to another country. perhaps I am wrong but. (unless you mean perhaps using via wifi and some sort of internet based geo wangle. I don;t know if that would work TBH, might!)

In essence there are two levels of security - web side - this checks your account to see if you are US registered. All apps have this.

Device side - Some apps don't mind being delivered internationally. Some refuse completely. It's a crap shoot. If you bought it while abroad it would still be in your to be delivered things when you hit a network of the right nation. Also not a great deal of help.

b) all 3g data goes thru amazon so "No," a proxy won't help. Nor work I would imagine.
(unless you are talking some custom sim or other thoughts really exotic, then the world is your oyster as long as it's not Amazons dime.)

c) you can amend the proxy details on the wifi (as you say), but this just grabs stuff from your local router so again see a) (there may be some caveats to that, others may know)

In essence, if one is attempting to use data - that is paid for by them - I would suggest the answer is no, and honestly IMHO I think that's rightly so.(irrelevant)

As the discussion is about "Getting Software" not "Using data" - well, that's a bit more grey area IMHO. licensing for the kindle software really never got very far sadly which is a bit of a shame for all those users who thought it should. So on this subject - yes - amendments could be made and steps could be taken to - probably - obtain the software (for full price where relevant)

Hope that's nice and clear.
I wasn't exactly sure what you were driving at. Data or Apps. Either way - it's a crap shoot