There will be two Twisted-related talks at PyCon this year:
"Tahoe: A Robust Distributed Secure Filesystem" -- Brian Warner, of Twisted Foolscap fame, discusses his company's distributed file system, built on Twisted. Tahoe is free, secure, decentralized, fault-tolerant filesystem. This filesystem is encrypted and spread over multiple peers in such a way that it remains available even when some of the peers are unavailable, malfunctioning, or malicious.
"Adventures in Stackless Python/Twisted Integration" -- Andrew Francis will be discussing the Web Service Business Process Execution Language, particularly he integrated Stackless Python and Twisted.