So I finally got around to trying this much-bally-hoo'd comment system called Intense Debate. If you didn't know -- IntenseDebate was recently purchased by Automattic. There's a new upgraded plugin if you want to integrate IntenseDebate comments system on your WordPress install.
It's pretty cool. Not bad. Brings in gravatars, some settings to choose the sizes, threaded comments and quoting (meaning you can reply to 1 particular comment)... and they back-up + spam-filter your comments, and there's easier comment moderating if you need to mark spams and approve.
My problem with using IntenseDebate (on my first try) was, it didn't seem to support my Custom Smilies from another plugin.
I didn't see the clickable-smileys in the Write Comment area. And it didn't seem to render the smiley codes that are already in many of my comments like this :) and this :punk:
Anyone know? What's your reaction to IntenseDebate? Have you tried it? Still waiting to see what WP 2.7 does with this, as well.