I thought you were talking about those newer glasses with the nucleation points etched in bottom of them.
Those SN Spiegelaus have a hop cone etched into the bottom. Doesn't make the beer taste any better, but kinda cool anyway.
cool-my generic ones don't have that.
perhaps the secret to both foam and retention is a combination of things- enough proteins in the beer, high viscosity, proper carbonation and temp, clean glassware, and even high alpha bittering hops....the latter is one I just read article on and indicates use of a high alpha bittering hop such as magnum can aid the head retention. Interesting as I do tend to use a high alpha for bittering in many of my beers.