Just last month I went to Australia and whilst there found a group called amaysim which for $20 gave me $50 of free calling and for $40, 4GB of data. 

I am off to the USA for 8 days and I was hoping to do the same thing, but I can't seem to find a provider.

Anyone regularly travel who can let me know what they do for data when they are away. It would be ideal to get 2-3GB.

Cheers