We don’t have to tell you (but we are obviously anyway) how important this is for applications going forward. What it means is that if some company like Fring gets off of their asses and creates a Skype or Vonage application for the iPod, we’ll be able (with a cheap dock – headset adapter) to use iPod touches to make and recieve calls.
Its also cool for apps like voice recorder and perhaps even some low powered voice recognition stuff in the future.
Apple, will probably fight this kind of development tooth and nail to keep the iPod touch from cannibalizing the iPhone sales. How much would you pay to have Skype on your iPod or iPhone?