There's a new book published by New Riders called Speed Up Your Site: Web Site Optimization (accompanying website here) aimed at helping you "speed up your site from primarily a client-side perspective." My Dialup Revelations in France reinforced how critical page size and load time is for a good user experience. A review copy is on its way to me, once I've had a look-over, I'll post my thoughts. Based on the advanced praise (from Nielsen, Morville, and Rosenfeld), it looks promising.