Microsoft released a separate toolkit for using the CCR and DSS framework inside your own applications, enabling Concurrent programming inside your regular C# (or VB.NET) application. And managing a directory of services with the DSS framework. So there is no need anymore for using Robotics Studio for these environments.
Get the whitepaper here:
Also read the stories from Siemens and Tyco, Siemens uses the CCR to scan mail (not email) and OCR the results and Tyco using the CCR for a security system. Both with great numbers of messages.