I had no idea that the Internet Archive included a Pulp Magazine Archive, until Boing Boing noted that the full run of If Magazine had been uploaded:
Included in the collection are all of the issues edited by Frederik Pohl from 1966-68, three years that netted him three consecutive Best Editor Hugo awards. If‘s Pohl run included significant stories by Larry Niven, Harlan Ellison, Samuel Delany, Alexei Panshin and Gene Wolfe; it was the serialized home of such Heinlein novels as The Moon is a Harsh Mistress, as well as Laumer’s Retief stories and Saberhagen’s Berserker stories.
As if I wasn’t already completely out of free time!