What is Ubiquity?

Ubiquity is an extension that allows you to enter commands that have knowledge of page content and return new information.

You can learn more about Ubiquity by reading Atul's blog post entitled Ubiquitous Interfaces, Ubiquitous Functionality, or try it out via the User Tutorial.

Other informative blog posts about Ubiquity include:

Participation

General Google Group/mailing list - Useful for discussion of command development, user interface, feature suggestions, and other high-level discussions.
Core Google Group/mailing list - Discussion of low-level internals of Ubiquity.
Get Satisfation - Ideas, Complaints, Forum, and "Customer Service"
#ubiquity irc.mozilla.org - Live internet relay chat discussion.
CipherHive allows you to use mini html blocks and upload javascript creating a total Ubiquity build environment - share and develop your Ubiquity Code online. Use CipherHives Moodle based interface to build and share your Commands without the need of hosting your own webpage. CipherHive is an Open Source Social Group.
Commands In The Wild Add links to your commands here.
Ubiquitously, an Ubiquity developer geared forum
Issue Tracker - Used to report/discuss bugs and submit patches for Ubiquity.
Ubiquity HG Repository - The Mercurial source code repository for Ubiquity.
Buildbot - Continuous integration that runs Ubiquity unit tests after every commit. If the tests fail, they're reported immediately to the mailing list.
Credits

@mozillaubiquity: The main source of news & info about the Ubiquity project via Twitter. Be sure to follow.
@azaaza: Mozilla's co-lead developer for the Ubiquity project
@toolness: Mozilla's co-lead developer for the Ubiquity project
@reybango: Evangelist for the Ubiquity project
@theunfocused: Fellow Mozillian Blair McBride
@_abi_: Created the Devo Firefox extension which provided a keyboard command launcher similar to what Ubiquity is today.
@fernando_takai: Major supporter of Ubiquity.
@mitchoyoshitaka: Resident linguist

The Herd keeps track of all Ubiquity scripts. For more information, see the following links:

Command Suggestions - use this page to suggest new Ubiquity commands you'd like to see.
Proposals for New Nouns
Proposals for new "Magic Words"
Ubiquity Commands Center - an idea for a web-panel that maintains a database of Ubiquity scripts.
Ubiquity Trust Network - a proposal for a distributed trust network
Ubiquity In Thunderbird - let's make Ubiquity work in Thunderbird!
0.2 Roadmap Proposals - Brainstorming on possible directions to go for Ubiquity 0.2.
0.2 Design: UI and Security Extensibility - Design-related thoughts on how to make Ubiquity extensible in regards to security/command-execution and access by other Firefox UIs.
Proposed commands for uplift into Ubiquity 0.2