How do you use your Nano?

I have a great Ipod Nano that I received for christmas. I use it most days for general music stuff.

I ma however very interested in finding some other alternative uses for it. I know you can play games and have seen examples of the regular Ipods being hacked to play games such as doom.

Well, I am interested in finding out if you can do such a thing to the baby of the family?

I also use it as agreat file transfer device but have noticed that if it is formatted for PC it can load up on PC and Mac, however if it is formatted on a mac, file transfer only works with a Mac. I am not sure if this is Apple or Microsoft's problem!