As a jouster, I will not sign. I hate to say it, but I just don't see jousting as an Olympic sport working and I would hate to see a ton of concessions made until it no longer resembles the sport we know and love. I worry about the repercussions on those of us already performing jousts to our own high standards.
To be an Olympic sport, there would have to be strict guidelines and most likely it would require modern sport armor for horse and rider, which would make it financially out of reach for many of us already in the lysts, and destroy the beautiful image we try so hard to create. Nothing says history and chivalry like kevlar armor... Thus, those with money (and perhaps not the horse experience and skill) might be tempted to "break into" the sport for the Olympic notoriety.
I prefer jousting as it is now, a widely varied sport with many different styles populated by people who love the sport. Yes, it has its problems (some big ones to be honest), but I don't see making it an Olympic sport improving any of them. And it could make them worse, as the folks that are the problem children of jousting are the ones I see being most likely to pursue competing in the Olympics. I hate seeing people joust for perceived glory, at the expense of the horse, rather than love of horses, history, and chivalry. So I, for one, will take a pass on this.