Apex Class as action

Great idea, we have been considering doing this since Skuid was first created. For this to work, we would have to do either of the following:

(a) support several of the most common interfaces, such as:
 - Schedulable - execute()
 - Batchable - start()
 - Process.Plugin - invoke()
 - Flow.Interview  - start()

(b) create our own interface that we would expect others to implement, such as:

global interface Executable {
    String execute(String params);
}