clang/llvm in Xcode 3.2.2?

I just noticed that the clang in Xcode 3.2.2 was
bumped to 1.0.2. How does the Apple clang versioning
numbering relate to that used for the version
of clang? In particular, what version of clang will
llvm 2.7 ship with? I assume that Xcode 3.2.2 must be
using clang 2.6, no?

Typically the version numbers are completely unrelated and are not based on "official" releases. For more details you should ask through official apple channels.