The only folks in Washington seriously advocating a filibuster are extreme liberals with nothing to lose, like the National Organization for Women.
Strangely, even the People for the American Way doesn't mention the "f" word on its home page or its Stop Alito petition. PFAW doesn't seem to take its own Alito opposition seriously: just take a look at its laughably apocalyptic flash flick, "It's a Less Wonderful Life." If Alito on the Court would be so bad, why not advocate a filibuster? My guess is that Ralph Neas understand the political and legal realities where the Nags don't: Alito will be a fine justice. PFAW's holding their fire for the really conservative nominee.