Yes it does exisit in phpBBWell this is very
VERY interesting. This is exactly what brings me here. I've seen this done on a phpBB board and after asking on two separate forums for phpBB and getting no replies at all, I came across SMF

I own and run a phpBB board for macro and micro photography and also visit other nature photography forums. One of those which is a phpBB forum has this unique feature

Now this was done by a very clever guy and done only for this one site. So hes written the script for it and of course it belongs to them, but its one fantastic idea that I would love to get a hold of.
The thumbnail is the same image thats posted in the thread. You click on either the thumbnail or the text and it opens up for commenting. Very clever work and I've never seen it before and never had any replies when I've asked about it.
Now this sort of script or work is worth paying for IMHO or at least a decent donation of some kind. It takes time and time is worth paying for. IMHO anyway

So lets hope someone can come up with something. Just wish I was clever enough to do it to be honest, but I'm not

All the best and again, very interesting thread..
Danny.