My cousin Alesha (often a guest at the club meals I cook) recently got a job at Snooth a pretty cool new website. Think of it as a mix between social networking & a wine review site. You can post reviews of wines & Snooth will give you recommendations based on your ratings. You can search by price, vintage, type, region, varietal or user-submitted tags. It's also possible to buy wines directly over through the website. I haven't had a chance to review any wines myself, but the Thursday Club crew have always been saying that we were going to review the wines that we drink at every meal (& trust me, we drink A LOT), so hopefully we'll start using Snooth.
The site is still in Beta, so I'm sure that plenty of other awesome features will be added soon. If you sign up, add me as a buddy (http://www.snooth.com/profiles/JBoogie)