I have made some custom filters for glimmerblocker, that I have found to be very useful. They block about 95% of all ads, not including googles.
Code:
(.*)\/banners\/(.*)|(.*)\/banner\/(.*)|(.*)\/ads\/(.*)|(.*)\/ad\/(.*)
^banners\.(\w*)\.[a-zA-Z]{2,3}|^banner\.(\w*)\.[a-zA-Z]{2,3}|^ads\.(\w*)\.[a-zA-Z]{2,3}|^ad\.(\w*)\.[a-zA-Z]{2,3}
\/banners\/|\/banner\/|\/ads\/|\/ad\/
var iframes = document.getElementsByTagName("iframe");
for (i = 0; i < iframes.length; i++) {
var mydomain = document.domain;
if (mydomain != "live.com") {
iframes[i].style.display = "none !important";
}
}