As much as Microsoft has revealed about Windows Phone 7 thus far in the past two months, one critical, differentiating element that it's going to be able to lord over its competitors -- true Office support -- has been a bit of a black box. We're starting to see a little bit more about the Office team's next-gen mobile product now, though, thanks to a pair of new videos that have been published this week. The first focuses on the email and calendar experience, but we do see one pretty awesome trick when the demo opens a PowerPoint file inline from the email client, edits it, and sends it back to the original sender. The second video dives deeper on the actual Office hub, where we get a quick look at the Word editor -- and as you might expect, it's squeaky-clean and nearly UI-free, just like pretty much everything else in the platform. Peep the videos after the break.[Thanks, skipper]