WF best practice for multiple approvers in seperate WI's ?

[weston@clockwork.ca]

Hi folks,
 
We are developing a new wf template for approving budgets in projects,
transaction CJ02 triggered by status management. As part of the wf process one
of the activity steps has to be approved by n (not known until runtime) number
of approvers, each with a seperate work item in their inbox. The workflow
process cannot continue until all the approvers have approved all the seperate
work items.
 
I have thought about using forks, dynamic parallel processing elements etc.
 
Was wondering how other people have achieved this, and what is the best practice
?
 
Cheers
David Weston