Nokia's Lumia 610 is designed to be the one of the lowest-cost Windows Phones yet; if it comes to the U.S., I expect it to be free with contract.
The first Windows Phone based on the Qualcomm MSM7x27 chipset, the Lumia 610 runs an update to Windows Phone 7.5 commonly known as "Tango," which brings Windows Phone to less expensive handsets by allowing it to run on the 7x27 processor and with only 256MB of RAM.
