Re: call-to-action, it's between the signup button and the video tour. I might try to make the video tour link stand out a bit more, though.

The product itself is (intentionally) sparse and understated. This leads to (we think) a great user experience, but doesn't result in very good screenshots. :) We also didn't really want to overwhelm the user with a complex display of features, because our value proposition is being simpler and easier to use than our competition.

Good points, though.