Google Wave is a hot topic at the moment. The ambitious group collaboration and micro-messaging platform started rolling out in beta via an initial batch of 100,000 invitations two months ago. Many people still want invitations. Among those who’ve tried it, some criticize it, some praise it. For now it has a lot of usability problems that are described below. Yes, you should look at Google Wave. But there is no need to desperately long for an invitation yet.