Dr. Knobel sent me this link for VOICETHREAD.COM and I think it is a really neat concept. Sounds like a great way to expand your ideas and become extremely interactive. Its like taking blogging to the next level, where you can invite people and use different means of communication. You can write, speak, text, etc.
Definitely, go to the site and play around with the different demonstrations and let me know if you find any other cool stuff.