By Lenn Thompson, Founder and Editor-in-Chief Ever been to a Tweetup? Do you even know what one is? I think we can all agree that the term "Tweetup" is about as lame as it gets, but basically it's just a gathering of people who follow one another on Twitter.  I imagine that any Tweetup is fun for those attending, given that that they share common interests. But I find it hard to believe that the average Tweetup is anywhere near as fun as one organized by wine-obsessed, social media freaks. Amy Cheatle, tasting room manager and social media goddess at…