Google places iPhone app was announced today. This is the first rev of something that is likely going to be pretty big. A quick review:
Good: Lots of data, Aggregated feedback (Yelp, CitySearch etc.)
Bad: Very basic interface, no checkin, very few pics and most of the pics are taken from outside
Ugly: Hard to use, search based interface with very little browsing support e.g. if you want to find Indian restaurants close by you have to do a search. A little bit better taxonomy would be helpful
Ways to go before it become a highly used consumer product.