It's a post worth checking out simply for the photos showing progressively more rested steaks. It starts from "juice explosion" and goes all the way down to "totally no leakage" in a very dramatic series.
Added bonus: There's some interesting stuff in the comments about the dry salt curing of steaks that's also worth a read.
By the way, if you typically let meat rest by tenting it with aluminum foil, ruining the crust with steam, here's a method to restore the meat's crust.