I think these are the answers you're looking for...
Like arcade games or anything else game-related you buy on Live, you can re-download them as many times as you want once you have bought them.
The size is different because of different languages. But that shouldn't matter because now you can only download what is available in your country.
There is a list of problems for each game, I think it's pretty much the same problems a game may have when playing the original Xbox disc on a 360.
We don't provide the 'easy to program for' console that they [developers] want, because 'easy to program for' means that anybody will be able to take advantage of pretty much what the hardware can do, so the question is what do you do for the rest of the nine and half years? It's a learning process. - SCEI president Kaz Hirai
It's a virus where you buy it and you play it with your friends and they're like, "Oh my God that's so cool, I'm gonna go buy it." So you stop playing it after two months, but they buy it and they stop playing it after two months but they've showed it to someone else who then go out and buy it and so on. Everyone I know bought one and nobody turns it on. - Epic Games president Mike Capps
We have a real culture of thrift. The goal that I had in bringing a lot of the packaged goods folks into Activision about 10 years ago was to take all the fun out of making video games. - Activision CEO Bobby Kotick
