There are a ton of great posts about Vagrant, this is meant to be a very quick tutorial on how I get up and running with it for WordPress development. Written from the viewpoint of a Mac, currently running Yosemite.
My newest tutorial, and probably my most in depth one yet, has just been published on NetTuts! I have wanted to get an article there for a while now, and am thrilled I finally have. Please go check it out and leave a comment, there or here.