That's been the dream of the larger BPM community for like a decade. Not even close IMO. This isn't a criticism of Seam or jBPM in any way. You won't get close no matter what framework you use and regardless of what some slick salesman tries to tell you.
Worth a read:http://www.infoq.com/articles/seven-fallacies-of-bpm
What's the connection between jBPM and seam. Is it like this:
1) I define the flow using jBPM
2) It creates a state-machine that recides on the server that I can use (by beginning a process)
3) I have to create all the pages myself and the java parts that makes up the process, but can leave the navigation parts to jBPM?