I have done that as well as in an interim solution, but it requires a full net connection (i have an iTouch, not an iPhone), in order to access, and the issue is the interface, but the point is the repackaging. Like all other consumer products, packaging is key, and the smaller more convenient the better.
What roadfood offers above the other free services you mentioned, is that it offers not just reviews, not just locations, but a concept that has extremely wide appeal, notable local, and often historical, restaurants that reflect the culinary character of the area they are in.
Sure you can do the website, and if you want to go that route - check out NFL.com - where they have beautifully optimized their site so that the site intuitively knows it is being accessed by a iPhone and displays accordingly.
My point was more that the Roadfood insider service, which people pay for, could have a much wider application, and much broader appeal. Instead of a $25 annual fee, charge a few bucks on the application and offer similar features, but reach millions more people.
And Stephen, while I can't provide you with a free iPhone, I got mine by being the best man and only member of my buddy's wedding party. It was a gift - and in exchange, I had to set up 300 chairs in the rain at an outdoor gazebo in a local county park. I figured I earned a buck a chair.
But I can provide this: http://blog.wired.com/gadgets/2008/09/indie-developer.html
And in this economy, people are going to be more willing to spend $1.99, than $25 for a service ...