The Office 2007 team wants to know what you think about the features of the beta version. They write, "The best tool to use to give us feedback on Office 2007 Beta 2 is called Send a Smile. Install the Send a Smile tool and two icons are added to the notifications area of the taskbar over by the clock: a happy face to click when you want to give us positive feedback and a sad face to click when there's something you don't like." Read more in Tell Us What You Think About Office 2007 Beta 2.
The tool provides an easy way to send feedback--positive or negative--and sends a screen shot of what you were attempting to do when you clicked the smiley. Pretty clever. (Unfortunately the installation requires a somewhat arduous sign-up/sign-in process.)
And remember, Microsoft is not selling direct but through distribution; couldn't you do something similar in your products?
What are you doing to solicit feedback?