I am posting this as a bug here, but have also posted it on the forums: http://forums.atlassian.com/thread.jspa?threadID=13074
Basically, we need to give everyone in the company access to certain spaces within Confluence. But no group explicitly lists all employees. We do however have parent groups, which list children groups, which in turn list users. However, Confluence does not support nested groups, so even if we give access to the parent groups, access does not get granted to the users of the children groups.
This is really proving to be a show stopper for us right now.