If anyone is interested, I was experimenting with creating/modifying themes for LaunchBar and I created a "San Francisco" theme for LaunchBar 6 using the San Francisco system font (available elsewhere, see below).
UPDATE: If you are a registered Apple developer, you can get the final version of San Francisco (SF Display and SF UI) from the Apple Developer Connection website.
Go here for information and download: http://anderworx.com/post/119940300588/sanfrancisco-launchbar
UPDATE: I have tweaked the theme and called it "El Capitan" using the new, official font from Apple:
Download here: http://cloud.anderworx.com/bdxO