If you use the Adblock extension for Firefox, then you might want to install the Adblock Filterset.G Updater plugin - it periodically downloads and installs the Filterset.G list of filters into Adblock. (Note: it does preserve your personal list of filters.) For the regexp-aware readers, here’s the current filter set - there are quite a few ad servers out there!

Why isn’t this integrated into the Adblock plugin itself? My suspicion is the license is restricting integration. Shame that.