As the I in POCI stands for International i would also like to chime in... I am a member since several years and will have to renew my membership now...However, I am seriously contemplating if I am really going to do so.
Being an international member the only really benefit is the monthly Smoke Signals - I enjoy having a real paper magazine to read and always find something interesting in it (in addition to the classifieds and lots of interesting vendor ads/adresses) and think that Don Keefe is doing a great job. However the quite long delay in overseas delivery is sometimes a bit annoying and my personal feeling is that the content has drifted away a bit from the (for me) very interesting tech tips and restauration stories/tips to more show coverage and show car descriptions. As it is at least very difficult for me to attend any of the POCI shows, my personal interest in a lot of show coverage is only limited. Therefore I can not really see that the "International" part of POCI offers that much benefit or interesting topic.
One of the major problems (that has already been mentioned repeatedly in this thread) is the really quite horrible and more or less dead website/forum. Especially from outside the US the internet is the easiest (only?) reasonable way to keep in touch with the club, it's memebers and join maybe some online activities. In the current situation I have contact with the POCI only once a month through the Smoke Signals, whereas I frequent the PY forum on an almost daily basis and there is always something interesting new to read or learn. So I feel much more connected to the PY than to the POCI - and the PY is even for free...
As for the GMC part - i also own an old GMC (at least with a Pontiac motor) and can not say that i ever found something in POCI or Smoke Signals that was of any help or interest to me GMC-wise. My GMC questions also get answered here at PY...
I know that the interest in Pontiacs is truly international and I know several people here in Germany and a lot in Sweden who own really great cars (more fullsize than GTOs...). However, all these people I met either on the PY forum or on another international forum for classic hot rods (and only a few at local meetings) - none so far via any POCI connections.
So maybe it might really be an idea worthwile contemplating for POCI to join up in some way with an active and established internet forum like PY - it would probably be much easier than getting some life in the so called POCI forum and would most probably give a more active and alive feeling to the whole club with more member interaction - and also attract some younger members (i am 42 - not that young anymore but still quite at home online).
Helge