I noticed that the OpenWorklistItem method accepts a new parameter called 'SharedUser', does anybody know how it should be used?
I couldn't find reference to this parameter in the Developer Reference.

In conjunction and maybe related, what actually happens when a Client Event is defined as 'Allow any user to finish'?

I have a client event which I want to make available over the Internet, i.e. to an Anonymous user, but I found that even with the Allow any user.. specified, other users do not get any actions when the worklist item is opened.

Any insight greatly appreciated.