This topic is being discussed in another thread:

http://www.flyertalk.com/forum/showthread.php?t=405575

There is no guarantee that FFNs will continue. They will not continue indefinately, but the majority of people here think the promotion still has legs.

I think they will flush out the discount (PL) FFNs with at least one more round. But if the industry continues to improve, I think we will see them disappear, at least temporarily.

I'll call the courtesy card desk later to see if I can get an inside line.