interesting to see other sites following the lead set in this thread on tracking best prices for fans.
Note that the links provided on that price tracker are all affiliate links from which that site makes commision on any purchases (and it is not made clear there where the profits made will be going to as far as I can see - maybe an oversight?)
Sorry BW, I don't know how this works, how can you understand when a link is affiliate? @u2 is listing the best known places where to buy online...
EDIT: oops, Matt answered right now for me, too.