Your Karma on everything2 is calculated as your total number of blessings minus your total number of curses.
To find out what your Karma is you should check out the SuperDoc "Golden Trinkets" You should see some little line, and a number on the page. Example:
Every day, the gods see you and are glad -- you have collected 2 of their Golden Trinkets...
The example above means you'd have a Karma rating of +2.
If you don't see something like that chances are you havent accumulated any Karma yet. Don't worry! You'll get them, just be cool, contribute to E2 when you can. The gods will notice.
There's a bit more to it than that. When a god grants you votes or C!s, that goes in the "blessings" column as well.