From cashback to Live Search club we’ve been building programs to help increase engagement, usage, and loyalty. Today we’re expanding our efforts with the release of SearchPerks!, a new program designed to reward consumers with cool prizes — like frequent flyer miles, Xbox games, and music downloads — just for using Live Search.
To participate, visit http://www.getsearchperks.com/ and download the Perk Counter, a small download that appears as a toolbar in Internet Explorer. The Perk Counter keeps count of your searches using Live Search and awards "tickets" that you can redeem for prizes at the end of the promotion. We award 500 bonus tickets just for downloading and installing the Perk Counter. You’ll also earn an additional ticket for each of your queries on Live Search (up to 25 tickets per day).

You can accumulate tickets from the start of SearchPerks! today until the promotion ends on April 15, 2009. Registration will be open through the end of the calendar year.
Source- Live Search Blog