Google's upcoming 'Google Wave' communication platform is an interesting one; it's currently in testing, but it's arguably one of the most discussed online services this year. It's now been announced that it will even be getting its own app store, to help provide some more functionality.
According to The Next Web, the app store was announced at the Google Technology User Group meeting in London earlier, stating that, "an extension store is planned where developers would be able to display and charge for apps." This app store would help provide a bit of momentum for the service upon its public release, and it would be of benefit to developers also. Lars Resmussen, the engineer behind the concept of Wave, stated recently, "We'll almost certainly build a store... so many developers have asked us to build a marketplace - and we might do a revenue-sharing arrangement." It's known already that the company will make Google Wave's API public, so people can develop their own software based on it, and having a dedicated app store will obviously help keep everything contained in one place.
At the same meeting, it was noted that Google will not build a dedicated iPhone or Android Wave app any time in the near future, but instead will work to improve the mobile web interface; this'll allow them to update the service at any time, rather than submit a new app version for approval to Apple (providing its the iPhone app in question here).
Google Wave is certainly showing promise, but only upon public release will we truly know how well it'll fare in the real world.