Steve,
I use Greenclean (it's on Jim's link) I have both the sucker can (it hoovers the dust off) and the wet/dry swabs. It works OK, but it's not cheap. You can get it from Warehouse Express here
http://www.warehouseexpress.com/buy-...sors-/p1015783
Having said that...I had problems with my second-hand 5D. I tried the Greenclean on it and I couldn't shift it, so I ended up sending it away last month. Cost me £40, but they got it clean. Your camera is new so it should only be light dust, unless you have exposed it to anything yucky! (
insert yucky smilie here)