Just installed the latest Firefox nightly build (20040326) and either I'm on speed or the Firefox guys have made some amazing speed improvements over the last nightly build I installed (from a couple of days ago). Or else I'm just imagining things. But at any rate, it sure seems a lot faster than it did a few minutes ago. Especially rendering pages with tables (one of the things I've always thought Mozilla could do better).
Firefox just keeps getting better and better every day.