Google’s new lab project Shared Spaces is a space where users can share their work spaces with others by sharing URL and inviting them, first you need to select a gadget where you will be provided with a space to work with the gadget.This project is based on the previous Google Wave project (which is a web based platform with synchronous or asynchronous communication for real time collaboration and editing such as editing the same file at the same time or at different times from different computers depending upon your communication protocol) Shared spaces uses the wave gadgets where you can create and collaborate applications.
It has four main categories planning, productivity, polls and games like wave Sudoku, a Draw board for creating maps and etc, there are fifty different gadget applications available so you can create your work group, space collaborate gadgets using either emails, chat, buzz and etc as the share options.