I don't know. From a pending 140 to another pending 140 may be tough. I can't see any advantage of doing so.
tellan,
Its very encouraging to read your reply. I think in this current scenario they will do it. Do you know if the 485 from a pending EB1 application can be connected to a pending NIW application. When in the covering letter for withdrwal of one case I mention that they should connect it.
This is just like all applications should be filed at Nebraska, people send the regular mail to Texas and they accept cases.
In my opinion this interfiling thing will work too because of the complication with 2 485, etc