"Archer is a branch of gdb with the general goal of creating “the best c ++ debugger in the world”"

It's initiated by the Red Hat, who in July abandoned Frysk (a "Execution Analysis Tool") and moved their resources to improving gdb.

They're working to improve are C++ exception handling, exception parsing and pretty printing (of libstdc++ data structures). To facilitate the pretty printing work, they've embedded a Python interpreter in gdb. This looks to provide a more powerful gdb Python interface than pygdb.

Some more background on Project Archer:

I built the source and had a play. The PythonGdb link above has lots of information; I recommend looking at that.

Fedora plans to ship the Python scripting branch in Fedora 11, which is due to be released late May. It's rumoured that Fedora 11 will be the basis of RHEL6, meaning there's a fair amount of Red Hat engineers working on this release of Fedora.