Recently I launched the beginnings of a New Jersey - and surrounding areas - based unicycle website:
The main goal of this website is to post area rides and events that will be happening in the tri-state area in the near future. It is mostly geared towards mountain unicycling and trials but other events do get posted. If you live in the area, be sure to check it out and join us on an outing sometime. Also, if you know of an event that is not listed, please send an email to the address of the web master located on the page and they will post it.