On Wednesday, Google announced that it will send out more than 100,000 invitations to preview Google Wave. Several enterprises and individuals have already used Wave to build applications or in their work. Wave enables this because it is, in essence, a real-time mashup tool. Google is sending out more than 100,000 invites to preview Google Wave. Recipients will be developers who participated in the developer preview the Internet search giant launched in June, as well as people who signed up at a Web site to use the product and volunteer their feedback.