I built a "blower extension" out of 2" PVC pipe (and 45 degree elbow), several years ago. Built it to attach to my gas-powered leaf blower. It worked great on single-story house gutters. Fantastic, actually!
I experimented with several set-ups to clean the gutters on our current 2-story house. Unfortunately, they were all either far too heavy, or too flexible, to be of any use.
Another option is have seamless gutters installed. The process is similar with the exception that the gutter channels are made on site with a machine that takes flat aluminum stock and extrudes it to the K-style shape for any length as long as the flat aluminum stock does not run out. Seamless gutters have less connections and are less likely to leak. more here