Deep from the recesses of moodle.org, is a year 2008 block that lists replies to your forum posts. It is called the "New replies to my posts" and is written by Niall Barr. What does it do? It is an alternative block to the Recent Activity block (see theAppendix section below). The strength of this block is that only displays new posts in threads that the current user has posted messages in, resulting in focused feedback to the user.
I couldn't resist installing this block. It was very easy to install on my Moodle 1.9.15 production site. I then logged in with a student account or two and used those accounts to make replies to my own forum posts. Here's what the "New replies to my posts" block displayed:
Now what you see may lack the pizzazz and graphics that you were expecting, but it really is exciting.