I went to the World of Speed event this last Sept. It was one of the coolest things I've ever done. From camping at the bend in the road to having beers with new friends whilst watching some great machines race. It also gave me the itch. I've been thinking, much like other posters, about doing the 130mph and then graduating up. I figure my Bee right now could do the 130(it already has for a short stint), but I really want to get the 4-speed back into it before I get it out to the salt.
If you go, be prepared for, what I thought of as, a near religious experience! Walk through the pits, go to the starting line and watch the action, and best of all make new friends! Just about all of the teams are happy to talk about there combos and let you ogle over their machinery.