A mailing list for the Catalog SIG has been created, to discuss the design and construction of a Vaults/CPAN/LSM-like index for Python. Web pages for the SIG don't exist yet, but will be created soon.
The SIG's charter:
The Python Catalog SIG aims at producing a master index of Python software and other resources. It will begin by figuring out what the requirements are, converging on a design for the data schema, and producing an implementation. ("Implementation" will almost certainly include mean a set of CGI scripts for browsing the catalog, and may also contain a standard library module for automatically fetching & installing modules, if the SIG decides that's a worthwhile feature.)