intertwingly

I knew you could do it. ;-)

On the question of PB vs TB, I see the primary advantage of PB over referrer logs is that PB provides access to the fragment id. I see the primary advantage of TB over PB is that TB adds access to the excerpt. In terms of implementation, PB requires more logic on the server (how'd you get those titles?), and TB requires more logic on the client (scanning for trackback:ping).