Dianavan, there is, at the present time, no way to prove conclusively that Ames outed Plame since only the CIA knows for sure and they ain't talkin'.
However, since she was taken off active field work shortly after the Ames matter broke and given a desk job in Washington, it is reasonable to assume that the Cia no longer felt that she was a good risk for covert ops.
Of coures, if it could be proven that Ames DIDN'T out her, then that would at a lot more credence to the idea that Bush et al outed her and so should be taken out and shot or something like that.