So after getting information here (thanks to everyone who posted
) and reading around the forums I've decided to go with the Sony 350, it seems more flexible regarding where I buy from and like I said I plan on buying titles from lots of places, including retailers here in brazil, plus it is supported intertionally. I just wish it was a bit more "pocket" but I carry a backpack around everyday so it will be portable enough.
Also the company I work for is giving me an android based smartphone (the samsung galaxy S) which makes wifi/3g on the reader kind of redundant as well as allows me to download the kindle app and read stuff from amazon.
So how does that sound? The Sony 350/galaxy S combo looks to me like it will meet most of my needs.