It would be nice to see how karma is calculated. This wiki page seems to have old info.

I would like to see that the most valuable contributions would get most karma. Personally I feel this should be the order of value (some of them in shared position):

1. Products
2. Bugzilla, Package testing
3. Wiki
4. Blogs, Brainstorm
5. Comments
6. Groups, Discussion
7. Talk thanks
8. Talk posts
9. Favourites