Sorry have been interviewing prospective summer interns all morning so off the computer.
No never done it before but parents live close by and used to go to Lancing College so no the area well. I am doing the sprint though as big race is Vit so much later on (then copying your efforts last year and doing London as my Oly!)
Not sure how the pool will work - think it is 4 to a lane kind of stuff, slowest goes first but don't quote me on that. Nothing much to worry about on the bike. It is an A road (main one from Horsham into Brighton so can be reasonably busy) but it is fairly wide and lots of opportunities for cars to pass so hopefully shouldn't be a problem. Also relatively flat although there is a slight smallish drag on the first part. The only slight worry I have is the massive roundabout which joins A roads from Brighton, Worthing and Horsham (called the Washington roundabout). It used to scare the crap out of me when I was learning to drive so have no idea what it'll be like on a bike!!!
Anyway I will be there in full pirate gear as well so look forward to seeing you there (hopefully both of you if Saffers can make it - Saffers is there still entry room, maybe you can still get in?