When visiting the homepage, I didn't realize this was an additional service to an existing (and unrelated) iPhone app. I just saw the unrealistic (albeit funny) conversation on the iPhone and the (real?) testimonial next to it and left the site. It wasn't until I read your comment here that I realized what the site is all about.

So, I think the idea is great, but I also think your comment here does a better job at explaining what the site does than your actual homepage...