All you business-types who have been fretting over whether you're going to be able to crank out e-mails on the fly in Windows Phone 7 ... wonder no more. After the break are a couple of new emulator videos of Windows Phone 7, finally showing what the e-mail and Office experience may be like. Opening a PowerPoint presentation within an e-mail? Very cool. We're not sold on the on-screen keyboard just yet, but there's plenty of time for that, and we'll undoubtedly see a slider or two. [MobilityDigest Youtube via Engadget]