trackback question

I got this question in the comments of my latest blog entry:

"Is trackback enabled? Sorry I can't see it, anyway,
here: 
h
ttp://weblog.flop.ca/2006/03/20/1142905014329.html, are
my preferred 
ones. Cheers!"

In the comments field I do see a URL: field. Is that to be
used
for a trackback?

Here is the link to the actuals posts:
http://www.ghettojava.com/roller/page/gj?ent
ry=my_top_5_idea_plugins

-- 
The most beautiful thing we can experience is the
mysterious.
It is the source of all true art and science.
- Albert Einstein