FogBugz gives you full-fledged discussion groups built in.
Discussion groups can be private or public.
Private discussion groups are a great way to communicate in your team. Unlike private email, once conversations are captured in a discussion group, they will always be visible and searchable, capturing valuable development knowledge for posterity.
Public discussion groups are a great way to communicate with your customers and provide tech support for customers. The biggest advantage of communicating with your customers over a discussion group instead of email is that you won't have to repeat yourself so much, and there's a good chance that your customers will help each other solve problems before you have a chance to get to them.
FogBugz even lets you link items in discussion groups to cases, so you can make sure somebody deals with each customer problem, bug report, and feature request.
To learn more about Discussion Groups, see:
