It will be interesting to see how Baltar fits in with Boomer - it isn't clear that anyone knows he even tested her - that was, after all, not part of the scheduled testing, that was a pre-test screening. If he was true to form, he wouldn't have told anyone he even tested her (and perhaps he would have scheduled her "real" test for years hence) - thus, he'd be off the hook. The only one who knows she was tested besides him is Boomer, and she won't make much of a credible witness against Baltar, especially after they've already had one human-cylon exposed in an attempt to "frame" him. I think his secret is safe.