MACDAVE  Although pricey for what it does, this is a very cute addition to iChat. So, I decied to buy it, paid the 20 bucks with my Visa business card, and received an email promptly back from the developer with my registration details:

To register ChatFX please go to the Help menu and choose "Enter Registration Details" then copy and paste your info into the registration dialog exactly as it appears below:

Full Name: My Full Name

Email: My email

Registration Key: BLANK.

So, I emailed the Julian Miller, the developer back a few hours ago and still have heard nothing.

Remind me next time to spend the 20 bucks on a new toy for my hamster!!  
(Version 1.2.1)