Since frequent flyer mile redemptions are FFP-specific, you will find appropriate redemption threads in the FFP forums.

General, non-program-specific discussions could go in MilesBuzz (at a stretch: a 'best redemptions ever' thread) but I think it would mostly be program-specific.

How about a similar thread in the *A forum, since people could compare point breaks between carriers?

Please, don't put this kind of thing in Mileage Run Discussion (FFP-specific redemptions are not mileage-earning fares!)