Here is what I found. Thanks opc.three!

Using Service broker (SQL Server) to call a WCF service which could add data to the queue. There are tables related to the service broker as well which contain the messages so perhaps this can be used to replace the Queue Physical tables in some cases.

Get Started With Using External Activator - SQL Server: Service Broker Team Blog - Site Home - MSDN Blogs

http://blogs.msdn.com/b/sql_service_broker/archive/2009/05/18/get-started-with-using-external-activator.aspx

Service Broker Scalable Web Service Calls From SQL Database - Sergey Maskalik's

http://blog.maskalik.com/sql-server-service-broker/scalable-webservice-calls-from-database

Service Broker And Web services - Stack Overflow

http://stackoverflow.com/questions/3397278/service-broker-and-web-services