Saw a commercial for a blaster this weekend. Pipe shaped like a cane with a hose connection on the long end and a swivel spray nozzle on the hook end. Commercial showed them cleaning gutters from the ground and even blasting paint off brick. It almost looked to short to reach some gutters though. 18002571234. $19.95 plus s&h if you are interested.
After seeing it you could make one with 1/2" pvc and some elbows and connections, etc to hook to your garden hose.