@User: It is probably a rather late stage to add it, because we're trying to get a layout done now in time for the shuttle run, and a layout template for the user area ASAP so that people know exactly what size of an area they have to work in and where the pins are. The main problem with that idea is that it requires more than one wishbone master, and that really complicates the bus architecture. In principle I have nothing against it and I think that should be considered for the next shuttle run if not for this one.