theentry - 4:01 pm on Sep 25, 2010 (gmt 0)
Just checked the rewards page and a $5 amazon gift card costs 541 points. So 1 point is around $0.0092
The question now is, that how many points do you get for a search or a to-do thing.
Also it's a great move from them, because you need to use an other Microsoft product aswell ;)