Website navigation is useful

I emphasized the word "is", to counter Jakob Nielsen's claim that that navigation "may" be useful. In Merges' Theory column, Adam Baker reacts to Nielsen's claim that there are too many other problems with the web to make navigation using menus (e.g. global and secondary navigation) useful most of the time. Huh? I mean, hmmmm. Baker's reaction makes good arguments against Nielsen's view and is a good read.