Message Queues are very specialist for workflow, they are used in multi-nationals for connecting disparate systems, there really is very little need for most sites. The reason is that these queues and various other tools like ESB help with automation to increase revenue per employee, however that comes at a cost of implementation and most cannot make a return on investment.
Your employees need to embrace the change in business processes so rather than a hands-on approach, the processes are structured by the architects of the middleware, many employees find this very difficult to work with. You can look at eappware.com who specialise in middleware, which queues belong to, but they're not accepting any projects as they work with larger corporations, we use some of their tools such as CoreETL.
The end effect of good middleware is to allow business people to manage a process such as product supplier onboarding with no technical resource, however most tools are inadequate at this, the top MQ are solutions like IBM MQ and the ones we use which are derived from SAP processes, it's not something most sites can integrate in to their businesses due to the issues mentioned.
