After a three way conversation with the boyf and my sister we have the following suggestions:
P.T Barnum and "The Greatest Show on Earth"
The Fiji Mermaid
Spontaneous Human Combustion
The Bermuda Triangle
The Amityville Hauntings
Loch Ness
Monsters in general
Serial Killers - not sure if that's fortean but my sister asked
Zombies
Vampires
General ghosts (famous hauntings, etc)
Poltergeists - particularly The Enfield Poltergeist
Roselyn Chapel
Jack the Ripper
Exorcisms
Trepanning
and finally from the thread I was reading a moment ago - Black Stick Men
and a definate no to Crowley or UFO'S
No matter where or when the Uncon is we will be there, my sister has suggested Ramsgate as a venue but I feel that's more to do with being convenient for her rather than any other factor.