Google has unveiled an extensions gallery for Google Wave, the crossbreeds email with IM and document sharing.
The new extensions gallery - announced today - appears as a link in the navigation panel that runs down the lefthand side of the Wave UI.
The gallery displays extensions as a list of “waves” - the multifaceted conversation threads that serve as the platform’s basic building blocks. These waves include installers that then add the extension as an option on the toolbar that appears when you open a wave. The gallery is pre-populated with about 15 extensions.