I earlier wrote about a simple solution to capture screenshots
within your own application, but unfortunately the solution has
it's flaws. You can't capture the Application Bar or content
visible in a browser control. Instead I'm now leveraging the excellent
solution published on XDA-developers. It's an application that
can be installed on all developer unlocked devices which leverages
a background agent to react to the camera shutter button and when
pressed will capture the current screen. It also has some flaws in
that it can't capture a video or anything rendered by XNA, but it
still very useful until Microsoft includes this feature natively in
the OS.