$(document).ready(function() {
    //assume blog's height is always the tallest.
    h = $("#blog .content").height();
    $("#comments .content").height(h);
    $("#news .content").height(h);
});
$(window).bind('resize',function() {
    //assume blog's height is always the tallest.
    h = $("#blog .content").height();
    $("#comments .content").height(h);
    $("#news .content").height(h);
});