Per blu-ray.com:

Universal Studios Home Entertainment has announced that they will bring the Oscar-nominated film 'Milk' to Blu-ray on March 10th, day-and-date with the DVD release. Video for this Gus Van Sant film will be presented in 1.85:1 1080p VC-1 accompanied by a 5.1 DTS-HD Master Audio soundtrack.

Extras for this release include:

Remembering Harvey
Hollywood Comes to San Francisco
Marching for Equality
BD-Live
-My Scenes Sharing
-Download Center: Deleted Scenes

I'd probably pick this up if it included the documentary. Think I'll pass.

I just wish the deleted scenes were on the disc, and not part of that crap called BD-Live. Still worth a purchase, though.