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When they were on a hiring spree for CBB last spring or so I offered to help with the karma system. I send them a .doc with a mathmaticly detailed karma system that I worked out. Since I cant code PHP for the life of me thats all I was able to assist with.
Sadly nothing ever came from the system I proposed.
Long story short, the current karma system (50 karma per post) is more a place holder then anything. I am disappointed to say never got replaced :p
And no, there is no visual way to see what your karma rating is (unless they changed this is the 2.2 ver). Level in the RPG stats is not it. FYI