Information has surfaced on new sets which might be planned for the second half of 2010.  The information comes from the Netherlands where an online shop gave the tantalising information.

Motorcycle (set 8051) - Chain transmission linked to a 3 cylinder engine, new wheels, front and rear suspension.  The alternative model will be a helicopter.

Container Truck (set 8052) - This set is describes as "heavily motorised" - not sure what that means.  It will also have multiple linear actuators to "lift the container on to the back of the truck".   This may be similar to 2009's flagship Crane Truck.  The alternative model will be a dumper truck.

Mobile Crane (set 8053) - The model will have all wheel steer, 4 leg stabilisers, telescoping arm (to 60cm) and able to lift "heavy" loads.  This sounds about the same size as the Lego Technic Crane (8438) - not as big as the 8421 set and bigger than the Rough Terrain crane (8270).