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Conclusions?
Am I saying “don’t do forums”? Well, for many sites … yes, I’m saying that. If you have a site on some topical area of interest to colleagues and possibly a wider audience, I’d say (for most people): Go with Facebook and be done with it.
On the other hand, some types of forums seem to work out well for companies. Support forums, for example, do well because customers need help, and they’ll generally seek that out where ever it exists. So, if you’re a manufacturer, then a simple support forum will likely do just fine. Major brands or specialty companies with decent-sized fan bases can also do well."