Yahoo! Pipes is my idea of a perfect cloud based middleware. The problem is that the performance is not enterprise grade. I would be happy to pay a reasonable amount for a premium Pipes service with better performance. I’m not clear on the distinction between cloud based middleware and visual IDE. Yahoo! Pipes has both web service and YQL modules providing for a high level of customizations. It also has regex modules for infinite variety of processing. Further, Pipes outputs in numerous formats, including json, csv, html, etc. I’m doing a wide variety of things with Pipes, way beyond just processing feeds. I can refer you to my recent survey of “Artificial Intelligence Middleware” .