distributed computing implementations

[robin]

I am attempting to summarise the distributed computing implementations
available to Python programmers. My conclusions so far are as follows:

If you want the biggest, boldest approach and don't care about
overhead, use CORBA.

If you want a simpler approach but with performance and implementation
difficulties, use SOAP or XML-RPC.

If you want the ultimate in simplicity and are willing to foresake
multi-language support, use Dopy, Pyro, or Twisted Spread.

Comments? Specifically, what are the relative advantages and
disadvantages of the last three mentioned products?

-- robin