This got released last week and lets users schedule your on-premise conference calls or Live Meeting sessions through a web browser. It's probably most useful for Mac or Linux users, but I could see using it in a pinch if you're on the road somewhere without your machine. The installer runs on your Front-End servers and it will restart the OCS services, so plan accordingly before installing.
Luke Kannel already tossed up some screenshots of the interface and what's disappointing is that that it doesn't look like it's changed much since R1 of OCS 2007. It's not nearly as polished as CWA or any other Microsoft web application, but I suppose it gets the job done.