Was preparing for my upcoming trip to France, and thought I'd check out
the Customs page. To my undying dismay, we still have a limit if one
liter of alcohol duty free. So, I browsed and searched fruitlessly to
discern what the duty would be on the additional wine if I bring back a
half case or a case. No luck - can;t find any info at all on the US
Customs website.

Does anyone know what the nominal duties are on wine purchased abroad
and brought back, in excess of the one liter exemption?

In past trips, we've always brought back a few (3 typically) bottles of
wine. Declared them, and no-one cared. We were hoping to bring back a
case this time, of wines I can't get here. Assuming someone will care
at that point, and want to budget for the extra duties.