Best part of the '59 film -- Mahalia Jackson singing "Soon I Will Be Done With The Trouble of the World"
It's very dated and very much a product of its era, though. I can't imagine anyone seriously staging a play or musical about passing in this day and age, so many years after the civil rights movement, which made the need for people to pass irrelevant.
The themes in "Imitation of Life" were very popular in melodramatic literature for decades prior to the '59 film -- which, incidentally was the second film treatment of the popular novel (the first, which is superior in many ways to the Turner film, was from 1934 and starred Claudette Colbert and Louise Beavers). So popular, in fact, that the term "tragic mulatto" was coined to describe the protagonists of such novels. And the imagine of the noble, sacrificing, self-effacing black mother (played by Juanita Moore) who'd rather work as Lana Turner's maid than do anything else is little more that an update of the old mammy stereotype and would be offensive to many today.
Perhaps, someone could write a campy, TWEED-style, Busch-esque parody of it and play it for a few nights in Chelsea or somewhere, but a serious stage adaptation of this 70 year old novel with its tragic mulatto and its archaic views on race and passing would very likely be roundly jeered off of the stage wherever it was presented.
"What a story........ everything but the bloodhounds snappin' at her rear end." -- Birdie
[http://margochanning.broadwayworld.com/]
"The Devil Be Hittin' Me" -- Whitney