I don't like the tour at all. At first I thought it was just a single page of information until I saw the little "click here"-style link at the bottom. I think something like the navigation here (
http://www.slate.com/id/2245644/ ) would be much better.
I also notice that on the home page, while you say a great deal about what 80 legs can do, you don't say a single thing about what it fundamentally is. This always bothers me. Makes me think of the typical terrible business site that never says more than "We offer solutions for your business needs," which means nothing to anybody. "Crawl and process web content with over 50000 computers" could be selling anything. It could be selling a book about how to set up a web crawler. It could be selling a datacenter. There's nothing to tell me that this is a service which lets me submit jobs which will be run on your machines and from which I can get various forms of output.
I'm also bothered by the meaningless numbers on the plan comparison page. What is 1x speed and 5x speed and 10x speed? As far as I can tell as the reader, these mean nothing at all and are just random numbers someone made up to get me to buy a bigger plan.