Blawg
A weblog that deals with legal issues, often written by lawyers or academics.

Bloggerati
Big name bloggers who, by dint of their weblog's longevity and/or quality, and their propensity to champion and comment on the weblog phenomenon, have become well known among other bloggers. Derived from "literati".

Blogosphere
The world of weblogs or the community of bloggers, as in "the blogosphere is alive with the news of Saddam Hussein's capture". Some bloggers also refer to the blogging community as "Blogistan".

Trackback
A system devised by the people behind Movable Type to make it easier to track conversations between weblogs. So: I write something on my weblog. You want to respond on your weblog, so you write your piece, post it, and send a Trackback "ping" to my site to, in effect, say "hey, I've commented on your piece". At that point, my weblog automatically links to your comments. And so on.

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