Member appreciation thread in a similar vein to Dear Anon sounds good to try out.
Stuff like member appreciation sections that were thrown about in the other thread... I am less keen on though (if only because of the risks of turning it into a popularity contest and if it became like Member fanclubs... urgh. Never was a fan of those). At the least I think it would be better to just go with the appreciation thread and see how it goes for a while.