Neato! This is exactly what Google Wave needs if it wants to become a mainstream communication tool.
With an app store specifically for Google Wave however, the potential for something as great, if not greater than the iPhone App Store is a distinct possibility. Already, independent software developers have built and tested Wave applications that handle such tasks as teleconferencing, videoconferencing, and multiplayer gaming, but while the Apple App Store sells software only for the iPhone and Touch, a Wave marketplace could stock in-Wave applications, along with desktop applications, browser extensions and a world of devices, from laptops, phones, tablets and more with built in Wave support.
