[Twisted-Python] Check this out

[Itamar Shtull-Trauring]

http://cvs.zope.org/Packages/Spread/
http://www.spread.org/

 From the overview page:

The problem in building distributed systems comes from the need to 
communicate and synchronize the different components of the system using 
networks that are prone to faults. In every distributed system (e.g. 
replicated databases or application server clusters) there are inherent 
uncertainties about the current state of remote components. Due to the 
complexity of such systems, the construction of a reliable and efficient 
distributed system is very difficult.

Spread is a toolkit that provides a high performance messaging service that 
is resilient to faults across external or internal networks. Spread 
functions as a unified message bus for distributed applications, and 
provides highly tuned application-level multicast and group communication 
support. Spread services range from reliable message passing to fully 
ordered messages with delivery guarantees, even in case of computer failures 
and network partitions.