[rules-users] Drools Flows on web systems?

Hi drools people, I came from a long desktop-swing development history, and I always used statefull connections for everything :-). Now, I have to adventure myself on a web app and I'm learning drools, seam or grails for that. With swing examples I could understand well how to use drools... I got some tests working well.... But now Im getting some difficult to understand some concepts with web development. But I'll get there some day :) I would like to hear from you people about some things on drools that I couldn't figure out yet. Suppose that I have a long process with sub-process and lots of activities. some of this activities should run automatically by the system and some activated by human hands (by some forms to fill, some decision to take, etc). A really workflow.... And I want to track every step on this process and who is the people doing the human tasks.... This is a job for Drools Flows, right? What should be the best approach to take for using drools flows on this kind of system??? Should I use Drools Server or Guvnor or both for that job? And about drools sessions, should I always use Stateless sessions with those servers? How could I persist the long process flow instances on a web system? And about processes scopes, for example, one global variable declarared in a dsl, used by some rule that is running on different process instances, they share same value? Can I have a kind of callback like the on PetStore example that came with stateless sessions? Thanks in advance for any help or suggestions _________________________ Cristiano Gavião