Microsoft has setup a contest using their Bing Rewards to win one of five Nokia Lumia 900's. The contest "costs" 10 credits for some reason to get a chance in the contest, which is basically nothing in terms of Bing credits.
The contest runs through the month of April ending on May 1st. The winners will be chosen on May 10th and winners will be announced a week later on the Bing blog and contacted directly before then.
Sounds like a cool little way to potentially win a device. Of course most of you will probably buy a device before then, so consider this a chance for second one.
To learn more about Bing Rewards, head to their site to learn more: Dscoverbing.com/rewards/web
Source: Bing Rewards; Thanks, @purevibz, for the tip!