Went down to the Cleaning show at the NEC last week and ended up buying a few bits and pieces, but the best toys were from Kranzle pressure washers.
I bought one of their 300mm stainless steel flat surface cleaner and also one of their Turbo lances to go on our 2500psi pressure washer.
Used them for the first time in anger yesterday and I was very, very impressed at the speed and quality of the clean on block paving.
The turbo lance especially is awesome, I would say it is at least 4 times faster than a straight lance and the rotary cleaner was eating up over 1m2/minute!
I'm setting one of the lads loose with them next week, two more jobs lined up to do with them.