Didnt read the entire topic...
But, heres my thoughts;
Pro's:
Karma isnt associated with ranks, so, it would be hard for someone to use it as a cheating system... thats just a thing I had pondered, not sure if that makes sense to anyone.
Karma does issue credit to people who do help out quite a bit.
Cons:
It can be abused, however, true, SMF 2.0 does have more options for Karma...
It can be misleading at times, just like post count
People may just attribute Karma to people without valid reason
I'm kind of neutral, but, it can be fun.
If we do use this system, can we change the name "Karma" to something else, like, "Helpfulness"? Or some derivative that actually describes what we try and use it for? Karma sounds a bit funky...