See, one of the things I did in my layout was CSS it so that the LJ userhead was replaced by the favicon. Because I want to know it's someone or something on LJ when I see it on DW, and don't want Comms or Feeds to have a userhead.

And I register favicons as one of the first things I see about a site, I recall posting about a site that used the IE logo as their favicon, very offputting.