It's on the new King of the Hill blu-ray disc.
I discovered accidentally while looking to see what extras were included with KotH.
Watching Soderbergh's comments after the film, I was glad to see he feels about his film the same way I did viewing it. The original filmed version of this tale, Criss Cross (which he does not mention) is better. It drags and is muddled, whereas CC is faster paced and crisp. He speaks highly of his actors, but it must be said Alison Lohman is no Yvonne DeCarlo. (To be fair, DeCarlo would have been totally out of her element in a film like The Spitfire Grill.). The script was his adaptation of Daniel Fuchs' adaptation of the original novel; he'd have been better off making fewer changes to Fuchs'. The film just looks and feels to experimental, although I think in his comments he's a little harder on it than I would be. I've seen much lamer remakes.
"Well, for once the rich white man is in control!" C. M. Burns