every board I know that's tried it has rapidly ditched it, for some odd reason, behaviour tends to be ghastly, and you very rapidly get trolls and troublemakers (even amongst erstwhile peaceful boards)- it then needs 24/7 monitoring................
Personally, I don't use chat systems, I find them annoying - with the forum system, you can take your time over a reply, or carry on a damned near real time conversation anyway!

http://solarwind.org.uk - a small company in Sussex sourcing, supplying, and fitting alternative energy products.
Amateurs encouraged - very keen prices and friendly helpful service!