Yeah a flash drive/sd card would be a great medium, not sure it would work though.
TBH, that was what killed the N-Gage. They had their medium on a standard SD card which created rampant piracy for everything they released, no developer wanted to make games for it after its first year.
>The Taco jokes and people not understanding a why you would want to surf the web on your phone were just runners up. --- Purveyor of pixelated pornography since 1984 http://cdn.list25.com/wp-content/uploads/2011/11/aboss.gif