A lot of users have to change playback devices very often.
Currently they have to right click on the taskbar volume icon, select playback devices, click on the desired device, click at use as default and click ok.
It would be good to do this in an easier way.
This could be done in the taskbar volume icon window.
E.g. by clicking at the device icon (instead of showing the properties of the device which could be put in a context menu)
It could also be done by showing a new checkbox (or radiobox) to select the default playback device (like in Windows XP sound input mixer)
Of course only if more than one device is shown in the taskbar volume icon window (which can already be configured in Windows 7 RC)
A keyboard shortcut would also be good