Pingback+Trackback
- 2004-05-02 01:33:56 UTC - Baka
- 2003-01-18 10:24:14 UTC - Trackbacking across the universe
- 2002-12-31 04:28:55 UTC - In the world
- 2002-12-17 16:46:21 UTC - Pingback revisited
- 2002-10-11 13:30:30 UTC - Pingback implementation II
- 2002-10-11 13:00:09 UTC - Pingback implementation complete (I hope)