Guys and gals, I believe I've found a decent solution for live forum-related chat!
http://nelsonfoto.com/SMF/shoptalk/If not already logged-in on the forums, you'll need to log in to Chat using your NFf userid/pwd combo and you'll find various channels to pick from, all mirroring current forums categories. As a general rule, use the Public channel, though I assume you could arrange to meet on one of the other channels as needed. Frankly, I think it's overkill and the chat should be limited to a single channel, something I'll attempt to solve ASAP.
For now, feel free to play around with it.
One more thing: the chat is built on AJAX and Flash and requires, to my knowledge, Flash 9 in order to access. Users of WebTV might find they cannot access it, and same goes for folks using MACs with outdated Flash or OS versions needing upgraded before installing the Flash player.
Cheers!
Craig