Since I moved to Vista home premium I could not use any of these to get any relief from all that space...I think they way overdid it or I would put up with it.. but now, even with Vista, I have this and my browser back to reading email.... this works great....

Now there is an advertisement TD on the far right, which can be removed with:

      // Remove ad on the far right
      GM_addStyle("td#sky_ad { visibility:hidden;display:none;}");
      

To also remove it from the Yahoo! Calendar, I could only come up with the next code (in a separate script):

      //Remove ad on the far right for Calendar
      ad_td = document.getElementById('daydataview').getElementsByTagName('table')[2].parentNode;
      ad_td.style.visibility = "hidden;";
      ad_td.style.display = "none;";
      

it good working for me