On a humorous note, the token replacement system went ahead and replaced the tokens in my post when it sent it out (with the exception of {Subject}, since that is not replaced in the body). So I received this in my email, to give you a reference of how the replacements look for my last post:
I took a quick tour through the source code, and each of the following tokens are being replaced in the message body and subject. So you should be able to use Forums, at least. Any additions to this list would have to be a feature request.
body.Replace("mojoPortal", notificationInfo.SiteName);
body.Replace("Forums", notificationInfo.ModuleName);
body.Replace("Questions about Site Administration", notificationInfo.ForumName);
body.Replace("noreply@mojoportal.com", notificationInfo.FromEmail);
body.Replace("https://www.mojoportal.com/Forums/Thread.aspx?thread=9812&mid=34&pageid=5&ItemID=5&pagenumber=1#post40775", notificationInfo.MessageLink);
body.Replace("https://www.mojoportal.com/Forums/UnsubscribeThread.aspx?threadid=9812", notificationInfo.UnsubscribeForumThreadLink);
body.Replace("https://www.mojoportal.com/Forums/UnsubscribeForum.aspx?mid=34&itemid=5", notificationInfo.UnsubscribeForumLink);
emailSubject.Replace("mojoPortal", notificationInfo.SiteName);
emailSubject.Replace("Forums", notificationInfo.ModuleName);
emailSubject.Replace("Questions about Site Administration", notificationInfo.ForumName);
emailSubject.Replace("{Subject}", notificationInfo.Subject);