That's the name of a new blog, described by Will Wilkinson here:
Liberaltarianism isn’t something Brink Lindsey and I made up. (The word is something a New Republic editor made up, I think.) The idea of blending the best of libertarianism with the best of modern liberalism has been implicit in the work of a bunch of libertarianish political philosophers/theorists, and a bunch of those guys just started a blog, Bleeding Heart Libertarianism.
Matt Zwolinski describes the new blog as “a forum for academic philosophers who are attracted both to libertarianism and to ideals of social or distributive justice.”Jason Brennan writes about what he and John Tomasi call “neoclassical liberalism” and how this contrasts with standard libertarianism and the academically-dominant Rawls-inflected view Samuel Freeman calls “high liberalism”. Andrew J. Cohen, Danny Shapiro, Jacob Levy, and James Stacey Taylor appear to be on board. Do you hear that? It’s your paradigm shifting!
The gulf between the Obama administration's campaign rhetoric and governing record on civil liberties shows that building the left-libertarian alliance is more important than ever.