Bell Labs Innovations: Bell Labs Unveils Open Source Release of Plan 9 Operating System - The official press release.
Linux Today: Richard Stallman: The Problems of the Plan Nine License
LinuxMall.com: Plan 9 From Bell Labs' Space - Announcement story.
Open Season: Vita Nuova Breaks New OS Ground - Background on Vita Nuova and its Plan 9 plans. [UpsideToday]
Plan 9 - A few Netkey implementations, Syslog daemon.
Plan 9 Distribution 3 - New Operating System with many new perspectives from the original developers of Unix. Now open source and much more developed than before.
Plan 9 from Bell Labs - Good starting point from Toronto.
Plan 9 software and servers - List of references to various resources for Plan 9.
Plan 9 Wiki - Bell Labs hosts this Wiki for users to promote better flow of information. A Wiki is a groupware site, a portion of webspace which anyone may edit. Surprising amount of useful, often casually structured, information.
The 9term Terminal Emulator
The Plan 9 Research Group - Some interesting points: differences between Unix and Plan 9, some special services available only on Plan 9.
Vita Nuova Holdings Ltd. - Lead distributor for Plan 9 and Inferno OSs.