Chris, did you ever consider putting a "like" button on the forum? Maybe I'm getting lazy in my old age but there are so many postings I enjoy but I don't feel like giving an extended reply, but I would like to acknowledge them.
Maybe it's too Facebook? Or maybe it can't be done (for technical reasons) with this particular forum?
You probably might not like the idea but it's available on quite a number of forums and it does give you an appreciative kick when you get one.
It's a lazy option, I know, but ..... what do you think?