I have been using WordPress for a while now on few sites.
www.carcutt.net (personal blog) WP v2.0
www.andrewmullins.com (my sons blog) WP v2.0
www.appliedseo.com (businessblog) WP v1.5 (upgrading soon)
Thank you to everyone who made a template or extention I am using. :)
I am also just learning this wiki stuff and am enjoying it quite a bit. So much so, I am in the beginning stages of creating one myself.
Feel free to say hi!