i've never been to a Kumoricon speed-dating panel, but here's a pretty generic set up....
When you enter the room there will be two rows of chairs wrapped around the room, with the two rows set-up so that when sitting people will be facing each other. Girls will be instructed to sit on one side and given a sheet of paper, while guys are instructed to sit across frm the girls on the other side (I've heard of events where guys are given the paper instead but I've only ever seen it done this way.)
Once everyone is situated the guidelines should be explained, in most speed-dating panels it is a set rule that only the girls are allowed to ask for a guys information, or to initiate the exchange of info, at the end of each round (granted this rule changes from event to event too, but this is what I've seen at Akicon and Sakuracon.)
As for how a round works, the overseers will give a set amount of time (normally around 3-5) minutes, and when the event starts you will introduce yourself with the person across from you and talk about whatever until music or some other audio signal sounds, at which point the girl may or may not ask for your info, you exchange pleasantries, and one of the rows (normally the guys) will all sand up and rotate one seat over while the girls stay still so that they are now paired with someone new.
So the process repeats itself until the event ends... and VOILA! You have speed-dating. =]
