As Lyn has said most of the stalwarts of the old forum have gone and with them the "magic" they brought to the party, so to speak.
Some others did try to get smaller "get togethers" going (Newark springs to mind) and of course the annual Christmas gathering at the Euston Flyer in London (near the station of the same name) but in time these events have fallen by the wayside.
I personally see the way forward being based on regional annual get togethers where county support groups that meet regularly, liaise with adjoining groups to organise an annual bash. This way no member should have to travel no further than say 50-60 miles or so to attend an annual gathering.
The big problem with this idea is that many counties don't have support groups and as such people living in those counties will be immediately stymied.
Unless another "champion" rises from the forum's membership to take hold of the matter, I doubt if the likes of the Mill on the Soar get togethers will be seen again which is a real pity, as putting names to faces and socialising with those "faces" was something that many forum members and their wives and partners looked forward to each year.
I'm not being defeatist just pragmatic. Perhaps the majority of men with PCa (and or their partners) now tend to seek support and close friendship with similar men via social networking and are happy with that particularly as social media has come on in leaps and bounds in the 15 years since the first annual get together took place.