Lisa D’Amour and Melissa James Gibson have scored the Steinberg Playwright Award.Presenters of the kudo, nicknamed the Mimi and now in its fourth year, alternate between bestowing it upon a single high-profile playwright and handing out multiple honors to up-and-comers. Last year Lynn Nottage (“Ruined”) won the distinguished scribe prize. D’Amour and Gibson each get a cash prize of $50,000. D’Amour’s play “Detroit” was seen in a well-received Chicago production in 2010, and a team of commercial producers has announced they would bring the play to Broadway (although no ETA has been set). Her play “The Cataract” got a run a few seasons ago at the Women’s Project, and the scribe’s collaborative, site-specific work “How to Build a Forest” had a Gotham stint in June. Gibson logged a 2009 hit with “This” at Playwrights Horizons. Others credits include “[sic],” “Suitcase, or Those That Resemble Flies From a Distance” and “Current Nobody.” Selections were made by a team of legiters including Oskar Eustis, Todd London and Lynne Meadow.