I am going to America in a few months and I wanted to do some prior planning for using my Nexus One while I'm there. I've previously taken my iPhone and used a pre paid sim for voice calls and txts to and from the UK. The main problem with the SIM I used is that it doesn't support 3G or any sort of data, so having a smart phone is pretty much useless as I cannot use google maps or any other location based services without having a Wi-Fi connection. I want to find a pre paid SIM that I can use that has a data plan available as well that I can obviously top up while I'm there or over the internet while I'm there. I would appreciate any help with this. Thanks.