Sam Ruby has started a wiki to discuss what really
makes up a weblog entry. He started it out with the following:

Authentic Voice
of a Person.  Reverse Chronological Order.  On the web.  These
are essential characteristics of a online Journal or
weblog.

I think we should
expand the scope of this just a bit, from “online journals or weblogs” to
“syndicated content”. There are a lot of interesting applications of syndicated
content that have nothing to do with journals or weblogs, and these will
arguably only grow in importance over time. For example, event log
monitoring – no voice, and not on the web…but uniquely
useful.

In any case, if you’re
interested in syndication, definitely take a
look.