I never bother to read the buried comments on Digg, so might as well remove them completely. Normally a grayed-out "header" will be left behind, but this style removes that as well.

Credit: This idea came from John Resig's "Hacking Digg With Firebug and jQuery" screencast (http://ejohn.org/blog/hacking-digg-with-firebug-and-jquery/), where he creates a simple javascript bookmarklet to remove buried comments on Digg.