There's a great hint over at macosxhints today.
From terminal run:
% defaults write com.apple.Safari WebKitResourceTimedLayoutDelay 0.0001
and
% defaults write com.apple.Safari WebKitInitialTimedLayoutDelay 0.25
While the actual render time for web pages may be higher now, it _feels_ much faster (and may be more useful as you can sometimes start reading the page sooner).
