It's March 20th and, right on schedule, Sprint has started taking orders for its first Windows Phone 7 handset. The HTC 7 Pro, renamed the Arrive on the Now Network, can now be had for $200 after rebate when bought with the customary two-year contract. Amazon's doing its usual thing of undercutting carriers' own pricing by offering it up for 50 greenbacks less at $150, and we suspect other online retailers will follow suit. So affordability
