I alluded briefly to the emulator included in the developer tools released on the first day of MIX10. Originally, this emulator only included an Internet Explorer tile, foregoing any of the other bundled applications due to the fact that they're nowhere close to being finalized. Recently though, an enterprising developer has managed to unlock the applications that are already bundled within the ROM dump, lending some insightful new perspective to everything we didn't see at MIX10.
Obviously, there are parts of the emulator that are very polished, and other parts that are still very alpha. It's important to not get the wrong idea about this being representative of the polish of any of WP7S, and Microsoft has already made the following statement to Cnet's Ina Fried:
"When we decided to provide a Windows Phone 7 Series Emulator as part of the tools, we anticipated that people would attempt to unlock and explore the code. We have been very clear that the emulator is based on early code and is not reflective of the final user experience. Windows Phone 7 Series is still under development. The UI has been disabled to avoid confusion and allow developers to focus on testing applications on the underlying platform. We continue to recommend that developers use the emulator as provided to avoid any issues and unpredictability that may be introduced by an unlocked version."
We dug through everything that was inside quite comprehensively and have put together a short walkthrough as well as screenshots of much of the platform that likely won't make it to release. Obviously, things like the task manager are important to Microsoft engineers, but won't be present in the final build. The same can be said for Speed Type, which appears to be a tool for the WP7S team to get feedback about the most common soft keyboard typing issues for building out an autocorrect database.