Judging by the use of the forum so far, it seems to me that it is developing along the lines of ' Anything even loosely related to Porsche that you want to discuss with PCGB members, particularly non-technical queries.'
The thing about this forum (for UK members, at least) is that there' s every chance of meeting and knowing your fellow contributors, so that cyber-friendships become real ones.
Rennlist is a very useful and friendly place but, in general, the bonds formed are not likely to be anything other than cyber.
Smartgroups is a great technical source, but not the place to chat.
The PCGB forums let people get to know eachother, exchange interesting information and pictures. People will point queries elsewhere, as appropriate.
FWIW, Ken, I think the way you gently encourage people (even when they would be regarded as going OT elsewhere) is a good thing. And I don' t say that because my own threads here are prone to do this (!), but because a lot of people will be new to this sort of thing - a friendly, non-threatening forum like this, where you know there' s a relaxed moderation, is just the thing to encourage people to foray deeper into other territory.