PoweriserPages is one of the largest Powerbocking Message boards. It features tons of knowledge and many active powerbockers from all over the world. The largest United States memberbase can be found here.
Pro-Jump is the United Kingdoms largest Powerbocking forum. Supported by a Jumping Stilt dealer. All brands are welcomed to be discussed, but links to competitors are frowned upon. Even still this is the most active forum on the web. But it only has a few United States members.
The NE Bockers is another North American Powerbocking Group. They cover the North East area.
EtnaJumpers is an Italian powerbocking group.