Jonah Goldberg's long promised-book is currently scheduled to debut next April, according to Amazon:

Since the rise and fall of the Nazis in the midtwentieth century, fascism has been seen as an extreme right-wing phenomenon. Liberals have kept that assumption alive, hurling accusations of fascism at their conservative opponents. LIBERAL FASCISM offers a startling new perspective on the theories and practices that define fascist politics. Replacing conveniently manufactured myths with surprising and enlightening research, Jonah Goldberg shows that the original fascists were really on the Left and that liberals, from Woodrow Wilson to FDR to Hillary Clinton, have advocated policies and principles remarkably similar to those of Hitler’s National Socialism.

Goldberg draws striking parallels between historic fascism and contemporary liberal doctrines. He argues that “political correctness” on campuses and calls for campaign finance reform echo the Nazis' suppression of free speech; and that liberals, like their fascist forebears, dismiss the democratic process when it yields results they dislike, insist on the centralization of economic decision-making, and seek to insert the authority of the state in our private lives–from bans on smoking to gun control. Covering such hot issues as morality, anti-Semitism, science versus religion, health care, and cultural values, he boldly illustrates the resemblances between the opinions advanced by Hitler and Mussolini and the current views of the Left.

Impeccably researched and persuasively argued, LIBERAL FASCISM will elicit howls of indignation from the liberal establishment–and rousing cheers from the Right.

That sounds about right, but I suspect the former will be greater than the latter, through no fault of Jonah's. There's a pretty fair amount of writing on the right from Paul Johnson to F.A. Hayek and John Lukacs that supports Jonah's thesis (as does this recent online piece by David Ramsay Steele) but much of it may come as a shock to those who've been unexposed to it.

Update: Looks like the publication date has been pushed back to August of 2006.