I used queues extensively a long...long...time ago when I developed manufacturing plant floor applications using PASCAL on a CTOS :smooooth: (Convergent Technologies Operating System) platform...we used the Queue Manager built into the platform that drove all the printers...worked great! We could create workflows and de-couple the slower processes to make sure they performed well on these speedy 80186 cpus...CTOS was great for that - but then again - it was purely message based and distributed to begin with! I've been eyeing Service Broker for some time now...and may use it in the future...I've been using SharePoint lists as a sort of queue for not-so-realtime applications (SSIS) to grab the data and bubble it up to the right people thru SharePoint...makes a good way to collect data from the an extranet where the users cannot write into the SQL db - but can write to SharePoint lists.