Huxley again. As you can see, an agnostic could be equated to a weak atheist using the former definition. I use the latter. You seemed to be insistent that an agnostic would believe in a higher power - I only see that as an optional belief after reading the above.
Sorry, I seem to have trouble communicating. I believe agnostics should have the option to believe in some type of higher entity if they choose, just not part of any organized religion, and keeping an open mind about the universe. I guess this coulod be considered a "weak" agnostic along the same lines of a "weak" atheist.