[xwiki-users] Calendar Customizations

Hi all, Before I start down this path on my own, I thought I would check to see if anybody has done any work with XWiki's Calendar application. I'm specifically planning to add start/end times to events and, I hope, the ability to export an event to Outlook Calendar format -- either by downloading a generated file and opening it using Outlook, or by generating an Email that's sent to the user like normal meeting requests. Has anybody tried anything similar? I don't want to reinvent the wheel if I don't have to. (And I may not be able to in the first place!) Thanks! Jamie