Question : Wordpress 3.0 Event Calendar

I am working on a WordPress 3.0 site for  a client. The site will have multiple sites within the main site. There will be a main site for everyone and then about 17 sub sites. I need a calendar that can be managed from any of the sites and will display on ALL of the sites. Is this possible? I've tried "The Events Calendar" which does allow network activation, but when I add an event to the main site, it does not show up in the other sites.

Answer : Wordpress 3.0 Event Calendar

                                                      For anybody interested in how I solved my problem. I used the javax.ws.rs.core.Context annotation.

@Context
HttpServletResponse response;

Then in my service methods I added this:
response.addHeader("name", "value");

That is it.