Oh wow - You just added a huge capability to my Agentry development skills as I was not aware that Agentry could handle exporting tables the same way it handles table "tables". All the BAPI examples I came across seemed to be limited to using the Tables area (not exporting area) which obviously don't support rawstring types for RFC.
FYI - I actually asked this question about using exporting parameters at TechEd but obviously didn't ask the right person.
Thanks yet again!
Cheers,
Matt