We've definitely learned a ton about Windows Phone 7 Series here at MIX, but getting the full picture on multitasking has been difficult, since the OS isn't ready, no one has final hardware, and the emulator seem to behave differently than actual devices and Microsoft's descriptions. So let's set the record straight on multitasking: it's not going to happen, at least not in the traditional way. Not only have we directly confirmed this with Microsoft executives several times, but the developer sessions here are totally clear on the matter -- you don't tell 1000+ devs that they should expect their apps to be killed whenever the user switches away from them if you don't mean it.Now, that's not to say that the OS can't do multitasking: first-party apps like the Zune player and IE can run in the background, and third-party apps are actually left runn