iPhone Web App or iPhone App?
silencio: Yelp has three options: Main site telling you that there is a Yelp app in the app store (I guess it's using the UA string), mobile site, yelp application.Ideally having both is nice, with the same functionality sans the native-only stuff (e.g. like you said location awareness and contacts). Yelp has different limitations for all three options - today I tried to look up a restaurant on yelp's app and found it, but I had to go use the full regular site to write a review (how irritating).