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Josh uses multi-touch to navigate through a really clever way of presenting material. I'd try and describe it, but it's really best if you watch it. 

Our own David Kelley talking on camera at the MVP summit about Windows 7 touch technologies, touch tags and their projects in the retail space.

Zhiming Xue has posted two videos in which is explained how an iPhone may be used as a controller for a Silverlight app on Windows 7, or how a Silverlight application with MIRIA custom controls works on Windows 7.

In a recent blog post Chris Klug discusses how he created a Silverlight 3 multitouch application on Windows 7 that communicates with an iPhone application called OScemote. Pretty interesting stuff.

The other day I had a talk to give which included a little around Windows 7 shell programming in .NET 4.0 Beta 2 and I hadn’t really looked at it so I took a few mins out to take a look at how you can program the Taskbar in Windows 7 from WPF in Visual Studio 2010 Beta 2.

I was really looking for a short, snappy screencast to take me through it and I didn’t find one ( which doesn’t necessarily mean that they don’t exist but I did search around a little ) so I made a couple that I’ve embedded here.

Pete Brown blogged about changes he applied to the Silverlight C64 Emulator that allowed him to use the accelerometer as a joystick.

My primary development machine at home is still (gasp!) running the 32 bit version of Windows 7. I just haven’t gotten around to paving it to upgrade to 64 bit. My other machines, including my presentation laptop, are all running 64 bit.

Prior to PDC, I had made some significant changes to the Silverlight C64 emulator. I added sound, started to add a touch-enabled user interface, fixed up some minor perf issues etc. One of the changes was to enable access to the Windows 7 device API in order to use the accelerometer as a joystick.

I started with the SL HDView solution created by Eric Stollnitz and available as source code on codeplex: http://research.microsoft.com/en-us/um/redmond/groups/ivm/HDViewSL/ and transformed it on a SL3 app that would fit my needs. One cool feature worth mentioning is that this player has the possibility to render 360 panoramas, something not available out of the box by Silverlight deep zoom implementation.

For this blog post I thought it would be useful to point out the new Silverlight 3 features that I took advantage of for this app.

Inspired by this blog of Tim Heuer - "Silverlight 3 Multi-touch: The Basics", Jobi Joy decided to experiment with it and create a small sample.

The logic is pretty simple, I have used TranslateTranform and ScaleTranform to do the movement and scaling respectively. When the TouchAction is Move we can distinguish whether it is a single touch or multi touch from the TouchPointCollection count. When it is a double touch you can calculate the change of distance between the two touch points and transform that as ScaleTransform of the Visual. Please watch the video, I shot on my office HP Touch smart machine.