OK, so there's still no telling if Microsoft's rumored "Courier" project is real, or if it ever will see the light of day. But as a project, it's certainly gaining credibility with Gizmodo unearthing new details about how that slick interface works.
What's that have to do with Windows Mobile, you ask? Admittedly, not a whole lot. But it's another reason why we're expecting Windows Mobile 7 to not just be a new iteration of the operating system of yore. Also, tie it in with that mobile UI concept video we saw a while ago. (And if you want something more near-term, again, we'll point toward the Zune HD.) Even if the Courier never gets out of the concept stage, it shows that there are people thinking into the future. Now Microsoft has to let them loose.