Atlanta natives, take note: Sid Mashburn, the preppy-cool gentlemen’s haberdashery on Howell Mill Road, will soon have a new neighbor. Ann Mashburn, Sid’s wife, is getting in on the action with a female counterpart to her husband’s eponymous store. No news yet on when the Ann Mashburn boutique will officially open, but when I met the future proprietess during her visit to NYC this week, she seemed to think things would be in place by May. Stay tuned . . .