The primary goal of the homepage is to inform visitors of "what we do" within 3 seconds - we need to pass that 3 second test. All the examples of websites that I like pass the 3 second test. This is also known as a single page website.
I am open to ideas, but the image I have in my head is an iPhone on the right-hand side of the screen that lists fantasy football leaders with Fantasy Points (i.e. Ray Rice 35.5, Adrian Peterson 29.6, Cam Newton 28.9, Ryan Matthews 26.2, Aaron Rodgers 25.6). To enhance the visuals, I'd like to also include team logos/colors with the players names.
So, with an iPhone on the right-hand side showing a mobile app with fantasy leaders, we now need to show the text of our message. I feel that the best text we can show would be something like the following:
"NFL data feeds for your website or mobile application"
"Add relevant NFL scores & stats to your website in minutes"
"Get started now for $39/year"
I think this gets the message across in 3 seconds provided the visitor knows what a data feed is. If we want to spell this out more in imagery, then we can always use some XML imagery somewhere in the homepage. Maybe XML can be transforming into the iPhone showing the NFL mobile application. If this can be pulled off while maintaining a sense of simplicity, then that would be a huge plus.
One final thing to include is a Call to Action. The main thing we want users to do is Sign Up for a developer's license. I don't know the best verbiage for this. Feel free to be creative with this.