Fredrick Lundh has announced a SOAP 1.1 implementation for Python.

Lundh notes that soaplib.py is still experimental software, and best used at the moment for XML-RPC style communication between Python programs. It has, however, been shown to work with UserLand's Frontier SOAP implementation and is expected to interoperate with IBM's Java SOAP classes.

Jan G.P. Sijm has released an XML-RPC client and server for COM.

Sijm provides some good documentation, with examples of how the COM objects can be used from Visual Basic.