The HDMI spec for 3d over blu-ray got finalized with version 1.4. There are BD titles out now in 3d but use the typical 3d glasses. Avatar on BD might be the first one that follows the 1.4 spec... you'll need a HDMI 1.4 compatable BD player, cables, and display when the day comes that they do it right using polarized glasses, etc.
I don't see this 3d thing taking off in the home environment (and so do a ton of industry analyst) anytime soon if ever. It's nice to see at a movie theater (albeit gimmicky) but until they can ditch the glasses, I don't see it going over in a big way.