you could join the dob group on here http://www.derelictplaces.co.uk/main/group.php?groupid=10 or (if I am excused for posting details of another forum) there is a DoB section on the pillbox study group forums - you do have to join the PSG with your real name.
To save confusion, if you have photos of the things you're updating then feel free to post them as a thread in public, if it's just grid refs on their own then PM them directly to cptpies as they're of no interest to everyone else.