Chrome Becomes Extensible
Plugins and extensions for Google Chrome have arrived. As of developer build 220.127.116.11 of Chrome, the browser is now extensible. A page showing how to create extensions recently went up on the Chromium project documentation site as well as some samples--including a Gmail checker. A recent developer release is required to try out the functionality.
The main document page for Chrome extensions is here. Support for extensions is still very early stage, so they are not yet ready for general consumption.