I stumbled upon this cool application for Skype which allows you to change from headset to speaker phone, or any other audio device using Hotkeys (keyboard shortcuts) or voice command. It is highly unlikely that I am going to use the voice command, but the Hotkeys-based switching is already coming in handy. The product is the offering from NHANDZ, an independent developer with many Skype-related products. AudioID for Skype on Windows sounds especially interesting.