Have access to Google Wave preview? Then access this public wave:
Got a webcam? Try our new Nimbb Gadget!
Try using the Nimbb Gadget to leave a comment! All you need is your webcam, and 1 second to press "Record". Then, you simply record your 30 seconds video and click "Save" when you are done to publish the video in the wave.
Fun fact: when you are recording your video, other participants in the wave will see this text: "[your name] is recording a video." Once the video is published, everyone in the wave will see it.
For steps to install the gadget, see this link:
Nimbb Gadget for Google Wave
Enjoy!