help for USB 2.0

[ambuj]

Hi,
this is the my first post here.. right now i m working with adruino mega adk kit. so i want to learn how to use USB host.
in this matter i tried lots of things but nothing happens.
Right now new library is released but it doesn't work with mega adk so could u tell me how could i make this library compatible with mega ADK.
i m using arduino-1.0 for compiling

and also tell me that which android phone work with mega ADK or can say what is the minimum requirement.??

Here this library
https://github.com/felis/USB_Host_Shield_2.0