The AG Wine app was recently listed among Mashable's list of the Top 10 iPhone Apps for Wine Enthusiasts. AG Wine created their app to stand out from other wine selection apps by offering a unique search method that takes you through countries, regions, styles, appellations and food selections. It's $3.99 price is on par with many other wine apps, but offers a more robust description of wine regions and grape varieties. What is lacking is a retail component. Once you find you're perfect bottle you're at a loss of where to get it in your area.
See the iPad demo version below.
*This app is available in both the iPad and iPhone version.