After my interview with Jak Calcutt the other day, he introduced me to a great roller coaster -- I have to say, this is the best ride I've ever seen in SL. I haven't had the opportunity to ride a lot of them in RL so I have few experiences to compare ... I sure wish I could ride one this big in reality!
I wanted to tell you more about it but it's just kind of there, with no explanation; it's called the Cyclone, and it takes up an entire sim boundary on Soho New York. The owner is a resident named followmeimthe Piedpiper, and the associated company on Marketplace is Sweetbay Designs. Sweetbay sells things like railway stations and railways and houses; large architectural features. Interesting store.
But the roller coaster is wonderful! It's the kind of thing you have to see for yourself. Here's a SLURL. Ride by yourself or take a friend or two (hint: try sitting in the second car and check out the gestures!). I had fun; you will too.