Well, I've finally done it... I've moved the forum software to phpbb after becoming ever more frustrated with the old board. Unfortunately, I haven't yet found a way of converting the old board, so any old user will have to re-register (sorry!) and old posts have been archived.
But, the old site remains a wealth of information, so visit www.marcpeters.co.uk/videoeditingforum/ to check out the old threads.
Hopefully I'll be able to convert it in the future.