Hey all, just wanted to give a quick but important update to the post on integrating SharePoint 2010 with Windows Phone 7 (http://blogs.technet.com/b/speschka/archive/2010/11/21/some-windows-phone-7-and-sharepoint-2010-tips.aspx).  After playing around with this some more and reviewing some of the tips left in the comments by our friend Tomislav, I got the right combination of things to get the Office Hub in Windows Phone 7 to open an FBA site. 

There were two keys to making this work as it turns out:

  1. You must secure your FBA site with SSL.  If you don't have SSL then you won't have joy.
  2. You must use a fully-qualified domain name for the zone.  For example, https://foo will NOT work.  However, https://foo.contoso.com WILL work.  This was the important distinction I found in my testing.

Hope this clears up some of the ongoing confusion around Office Hub support for FBA sites in SharePoint 2010.  Thanks to all the folks who commented on the previous thread; I think it's been very helpful to everyone that's trying to figure this all out right now.