Looks like Google Wave, the big G's cloud-based take on next-generation communication and collaboration, already works on the iPhone. No big surprise, though, it's browser powered and the iPhone still has the slickest browser in mobile. Google even showed it off on an iPhone during its debut at IO 2009. TechCrunch, however, found this interesting little bit of behavior:

Just like with any Web page on the iPhone, you can save a bookmark on your Home screen, and it creates a little icon which launches mobile Safari to that page. When you save the Wave bookmark to your Home screen, however, something different happens. You go to Wave, but without the Safari wrapper which allows you to navigate to another page or search the Web. Instead, it looks more like a regular app and there is no way to navigate away from it. Everything else works the same as in the mobile browser version.

This feature, as TechCrunch states, has been available to iPhone developers for a while, and helps blur the line between highly localized WebApps, and highly cloud-dependant widgets. If you're using Google Wave on your iPhone, let us know how it works for you. (And if you work for Google, send us an invite so we can try it.)