I hope this is the proper place to post this.
I thought of a suggestion that might be very useful at PAX. How about an App that can be linked to your badge to a profile using a bar code that is printed on the badge that a Smart Phone could read? The bar code could be linked to an online profile that "could" but doesn't have to contain contact info for someone at PAX. A Smart Phone App could be used to scan the bar codes and store it so people at the event could exchange contact info. Even better is if they had a mistake on their information they could update it. Everyone they shared their contact info with would see the update.
Just a thought