Let the hive mind of Engadget get that for you.
"As someone who doesn't reside in the USA, I was wondering what would be the best way to get internet for my computer in the US for a couple of weeks? If it were Europe I know I'd look for some prepaid data. Is there anything similar offered by American carriers? A MiFi or a data SIM that I can tether from would work, but I'm trying to maintain a tight budget. Help!"
"Earth to Sony and all Sony bashers..." welcome to the free market system. Everybody copies everybody. There are very few original ideas when it comes to consumer products these days. If you have a good idea that is fairly successful your competitor is going to introduce a competing product, plain and simple.