Yep, Z & RnR are using it for MTs. And I don't mean to sound too negative about original meshes; I think you can do poygon reduction in ZB. However, with figure creation, there is also an issue of design... creating a head mesh that can be morphed into natural-looking expressions requires a fair amount of planning. If you want to explore those issues further, I would recommend the boards at Z-Brush central (fougot the URL, but there's a link on the pixologic home page). You could also try the ZB forum here, but there's less traffic there than at ZBC.