I'm very excited to see so much enthusiasm for TogetherJS.

We are currently building something similar and plan to release that next week. It has lots of similarities but we target a somewhat different market. Some of the differences, you do not need to write a single line of code and it will even work with advanced application that require sign in without sharing security tokens.

We plan to release Surfly next week, but people who are interested in trying it out can msg me and can get a beta account.