Event-Driven Network Programming with Python

What began as an Internet game has evolved into a new open source framework for developing network applications. Email, instant messaging, Web applications and other Internet technologies may never be the same. We provide the first look into Twisted. Twisted: A Developer's Notebook is the first (and only) look at this new open source technology. The book includes projects that enable network developers to try out the Twisted framework for themselves.
There's also a brief mention of Twisted capabilities for programming abstractions, along with Woven, the module for creating Web interfaces for networked applications.