Is there a way to estimate the amount of data used when streaming music? I plan to move to the Droid 3 and Verizon from ATT and iPhone 3GS. The physical keyboard is my top reason, among several others. I will lose my unlimited ATT plan and be forced into a tiered Verizon plan. I am well under 2gb of usage now but plan to use the Google Music cloud service on my new Droid 3 to play music from the cloud and would like to estimate how that will increase my data usage and hence my cost. I would expect to do this a couple (2-3) hours per week. Thanks.