We have had wines before. I like them because it shows another aspect of creating things at home.
You're more than welcome to share your wine. All I ask is that if you want to bring wine, that you be able to serve it. A lot of tasters have questions and not a lot of us know what we're talking about with wine.
The nice thing with wine is that a few bottles goes a long ways.
+1 on the German connection with the wine.