I have completed 'Integrating Microsoft Silverlight with a SharePoint Online Page' from the SharePoint developers guide and it gets a cross-domain error.
I understand CrossDomain issues with Silverlight but I have two concerns: the guide makes no mention of requiring a crossdomain.xml or clientaccesspolicy.xml file which makes me think I have a typo except that I added the service in using Service Refernce. My other concern is that how would I add the policy file to the SharePoint online host - it would be quite useful?
Anyone out there done the example and presumably tell me that it worked fine - want to share the code over - I can just update the Url.