How do you estimate and use Business Value in your Backlog?

How do you get the right stuff built at the right time, and how much rigor do you put into this part of the planning process?

Story Points are for the devs, Business Value is for the Product Owners. Or so the theology goes. If there's truth there, how do you capture BV in the backlog - and how do you actually use it during Sprint Planning? I can start off the discussion by reviewing a quantitative-ish approach I've been using in out planning, and I'd love to hear how others are doing this with less or more rigor.