Reading through Bush's detention bill it seems to do two things with regards to the Geneva Conventions. A) Commit the U.S. to following Article 3 — except for those parts we don't like. And B) Removing any judicial accountability for not following even the other parts, so fuck you.
Page 79 says the administration...
...shall fully satisfy United States obligations with respect to the standards for detention and treatment established by section 1 of common Article 3 of the Geneva Conventions, with the exception of the obligations imposed by subsections 1(b) and 1(d) of such Article.
The exemption from the requirement of 1(b) is more curious. Let's go to the Geneva Convention Article 3:
1(b) Taking of hostages