On the ALF 502 & 507 fitted to the BAe 146 & RJ there is reduction gearing between the LP turbine and the fan. These gears are in the front of the engine just behind the fan. As a result of this the fan rotates in the opposite direction to the turbine.
I think this arrangement will probably appear in the next generation of bigger engines as the major manufacturers are talking about Geared Fans.
Hope this helps.