Sometimes when you see a post on
somebody's blog that you like, it's enough just to leave a comment
on the other blog about that issue. But what if you've got
something to say about the issue that you'd like to share with
readers of your own blog? If you do post to your blog, you have to
go and leave a comment in the other blog if you want the people
there to know about your own blog entry.
[From
http://www.muhajabah.com/islamicblog/what-is-tb.htm]
Do I have to be using Movable Type?
At this time, only
Movable Type is configured "out
of the box" to use trackback. However, if you have your own web
server space you may be able to set up
Stand-Alone
Trackback to work with your blogging system. You might also
wish to look into similar applications such as
Pingback.
No! Virtuoso's Blogg System
supports this feature.