(caution: mild geekiness ahead - it's for a good cause, though...)
There's an interesting site called www.whois.sc, which finds out interesting information about domain names (like YourWineryName.com). You might find it interesting to look up what they know about your domain name. Just append your domain name to http://www.whois.sc/. For example, here's the whois.sc listing for KingEstate.com: http://www.whois.sc/kingestate.com
One of the features of whois.sc is that you can see what Alexa.com considers to be sites that are related to yours (you can get the same info directly from Alexa - here's "People who visit this page also visit" for KingEstate.com). Alexa gets its data from people who allow it to track their Web surfing, so it's far from perfect (and non-existent for lightly trafficked sites, like most small wineries). Alexa also provides traffic estimates/rankings and lists sites that link to yours.
Both Whois.sc and Alexa provide interesting information about your domain and Web site, so they're worth having in your bag of tricks. Plus, they're free!
(WHOIS is the name of the internet protocol which allows you to ask questions about the ownership of a domain name. Every company that registers domain names (a "registrar") maintains their own WHOIS database. Some domain registrars allow you to hide your WHOIS information (usually for an additional fee), although this seems a little silly for a business entity.)