When a corkage fee -- what you pay to bring your own bottle of wine to a restaurant -- is small, tipping on it isn't an issue. Presumably the restaurant pockets the fee, so if the fee is $10, paying a server $1.50 or $2 to open a bottle isn't a big deal.
But in many big-city restaurants, corkage fees have ratcheted up to the point where it makes this an issue worth considering. You brought your own wine, and you're paying the restaurant to open it -- perhaps $35 a bottle -- in theory to make up for the restaurant's lost revenue. How much should you pay the person wielding the corkscrew? Is a few turns of a screw worth $7?
Sometimes the tip depends on how much service the restaurant gives you; if a server constantly refills your glasses, you should tip as on any other item. In my experience, though, most people who bring their own wine prefer to pour it themselves.
What do you think? Let's take a poll and find out.