A new and upcoming currency forum that is heavy on fractional notes has been developed by Richard Jacobson. If you have any questions on fractional or regular currency, this is the place where you can get it answered. It is rich with material on fractional notes. Please take the time to check out his site. You can check out his web site at the following link.
OTHER FORUM SITES
Another currency forum that has very active currency discussions is a site run by PCGS. Their topics are on a wide range of currency threads. This site can be viewed with the following link.
A third currency forum is operated by PMG but it is not highly used. You can check out this site with the following link
With all three forums, you will have to join to be able to post comments on their sites. Membership is easy to do and is well worth the effort.