The Microsoft Lync Web Scheduler has been available for a while ( April 2011). Its a fantastic tool for people on the go to schedule meetings.
I found a bug in this Web App back in May 2011 that does not allow you to schedule any meetings if your Lync Server is set with the date format DD/ MM/ YY.
You will receive "The meeting information could not be saved. Please try again."
Before making any changes, please backup the file you are about to edit.
Go to C:\Program Files\Microsoft Lync Server 2010\Web Components\Web Scheduler\Int\Scripts\common.js
and change $$("meetingTime").innerHTML = FormatDate(start, "DD, MM dd, yy", "mm/dd/yy") + (splitStart ? " " + splitStart : "") + (splitStart ? " " + splitStart : "");
$$("meetingTime").innerHTML = start;