You can't directly access previously created work items. The feedback loop gives you access to the list of output file(s) from the previous loop iteration, or any attribute values that have feedback enabled via the parm on the begin node's parameter interface. Those values are copied from the partition in the end block onto the corresponding work item in the begin block for the next iteration. The topology of the work items in the previous iteration is not accessible, though, so it's not possible to use a feedback loop to re-create a linear of chain of wedge nodes.
Ah too bad, I thought I could pull of a nice procedural wedge on a multiparm by using parmname+`@iternum` in the "Target Parameter" on the Wedge TOP... Maybe good as an RFE?
