This looks really cool, I like the layout. I have been working on something similar, (http://mobilethread.com http://mobilethread.com), which lets you setup/joi

This looks really cool, I like the layout. I have been working on something similar, (http://mobilethread.com http://mobilethread.com), which lets you setup/join anonymous chat threads and is designed to run in a smartphone web browser. I got around the emails issue by creating a unique URL for each thread which you can then email/SMS/embed in a QR code. When joining, a user automatically gets a random name or they can set their own. Finally, anything you post gets removed after four hours, inactive threads get removed after a week. I decided against Captcha but did implement thread creation/message flood limits.