An effort was made to shore up the Open Door in 1921-22 at the Washington Naval Conference, but a challenge was again mounted by the Japanese in the 1930s as they expanded their control in Manchuria. China would not be recognized as a sovereign state until after World War II.
The maximum number of connections across SQL Server versions and editions is 32,767. You can determine how many connections SQL Server currently has by looking at:
With SQL Server Express 2005 and SQL Server 2008 Express, the 4 GB database size limit applies only to data files and not to log files. However, there are no limits to the number of databases that can be attached to the server. For SQL Server Express 2008 R2 the database size limit was increased to 10 GB. I have a feeling that what you are after is the sp_spaceused system stored procedure.