Many are already in Kona and have signed up (310), they are capping the 2nd edition of the event around 400 or so. You can still register race morning.
More info at:
http://www.ironman.com/triathlon/events/americas/ironman/world-championship/athletes/race-week-events/hoala-ironman-training-swim.aspx#axzz3ELrzE7kK
All money raised going to local charities.
With the demise of the Kukhio Challenge this is a great way to get a full IM distance swim in under race like conditions prior to the race. Enjoy.
In, see you in a couple days.
how early do i need to get there to register race morning?
Race starts at. 7am, registration is 5:45 to 6:45, if you are not entered I would 6am to be safe!
I don’t see day of registration listed anywhere… are you positive you can register race morning? I missed out on the online registration and want to race but don’t want to get up early if I don’t have to 
(arriving at in Kona at midnight tonight)