Taverna is used by a large number (more than 350 at the last count) of academic and commercial organizations throughout the world.
Some examples of the Taverna use can be found here, both for particular subjects (domain) and also for how it is being used (deployment).
There are also a large number of groups devoted to particular subjects on the workflow-sharing myExperiment Web site. If you cannot find an appropriate group on myExperiment, then you can start your own there.
You can also ask on the taverna-users mailing list to see if anyone else is working in a similar area.