Sounds like a plan
As much as I like Windows Phone 7, Nokia will have a hard time getting Verizon on board. I remember reading an article stating that, Verizon would only support WP7 if it has LTE. Both Nokia and HTC have such phones planned for this year and Verizon has yet to want to support the platform. I believe that they don't feel the mind-share of WP7 isn't strong enough for them to actively support, despite the positive reviews from people who have tried or own the phones. It wouldn't hurt to have some of the low end Nokia WP7's on the smaller carriers, like Metro PCS and Cricket to increase exposure.
I can understand the mindset behind it but, at the same time, it really shows the bias that the carriers have towards WP7. Yes, Android sale and so ...