It would seem that the wine applications are just starting to flood the market. There's Cork'd, Log A Bottle, and now Winelog.net which is full of AJAX goodness.
The cool thing about Winelog is that you're able to input the wine's you've tried and rate them. It then can recommend wines that you might want to try based on *other* user's recommendations. So, a little bit of Amazon.com recommend style in an easy-to-use format dedicated to wine.
No mobile access yet though, which is just something that is very clutch for me. I want to have that so I can be out at the shop and get my recommendations.
WineLog - [winelog.net]