Online Games Download Site

Hey. Me and my cousin are thinking about writing a letter to nintendo suggesting improvements for a game. Is there any address that I can send to where they will actually read it and reply?Thnks ill give max points

Playstation universe or www.psu.com has alot of ps3 themes but i guess you are supposed to use the internet browser on your ps3 to get the themes directly but can you just put all the themes on a jump drive and transfer them to your ps3?