Terry,
Deeper Blue isn't going to have a stand as I personally think it's a waste of money (you should see the cost of renting space at these shows), especially as we're not selling anything. (Although we will be exhibiting at DEMA in October)
Freediver UK will have a stand at 822, so there should be a large contingent of Freedivers around there. I've got a ton of meetings to attend around the show but it would be great to meet anyone from the site, so either email or PM me and i'll give you my mobile number - or when i'm not too busy I usually hang around the Seven Tenths stand so ask there for me, or of course the Freediver stand.
Loic and Fred are going to be doing their talk at 12:30 - 13:30
As for gear, there isn't going to be any freediving specific as far as I know, but Freediver might sell some off their stand.
Finally, there is going to be a Freediver party going on just down the road at St Katherines Docks on the Sat night (again, you'll find me somewhere at the bar or on the dancefloor

).
See you there!