I got a link to a neat page in one of my e-mails. Apparently having Window's Media Player open (minimized not playing anything) will make your WoW load quicker. Here's the link:
Media Player boosts WoW performance - WOW Insider
I tried it myself and could notice the difference! It's not much of a media player, but it'll speed up your load times!
Just felt like sharing, trying to quit being such a leecher. Hope I got this in the right section.