There are some drastic changes to the FB program as of April 1, 2009. The most notable one being the new mileage earning scheme for Y: FB members will earn 25%, 50%, 75% or 100% mileage, depending on the paid fare class. (Only the Y/B equivalent fare classes will earn 100% miles.) This will likely impact the WP program as well.
More details in
THIS thread. For the detailed new mileage earnings see post #100.
We can only hope for the best....