I'm tasked with creating a multi-touch application but I don't have a multitouch screen or device and ours don't arrive for a month (Grr!)
Is there some kind of emulation or cheap USB device that we can get that will work with WPF in .NET 4 for the interim?
There are some small usb touch devices (like the Mimo iMo) but I'm not aware of any that have multitouch support beyond trackpad type gestures. As far as software emulation, the Surface SDK includes a very good simulator but the touch APIs for Surface, while in WPF, are a bit different from .NET 4. It may allow you to prove out and test your multitouch scenarios and then transplant that code into your full WPF application. Get the Surface Toolkit for Windows Touch too to give you a head start.