Blogging tools at Blogger (easiest) and Edublogs (more options)
Start a wiki at Wikia or PBWiki
Excellent online animated tutorial on using Audacity to create podcasts
Host your podcast/audio at Ourmedia using SpinXpress
Share your PowerPoint slides with SlideShare
watch your students work and peer edit with Google Docs
Capture animated lessons (like technology or tablet lessons) with Jing
Host video for your blog at YouTube or GoogleVideo
Spice up your math lessons with OSSLETS
Jan also shared Animoto
Alissa is going to try out Campfire
Lots of cool stuff happening through the Institute for the Future of the Book
Record interviews and conversations on the phone with a cordless/wireless phone recording controller.