The best way to discuss Cobra is on the discussion forums where you can get technical support and see what others are talking about. Or feel free to just say "Hi".
If you need to contact the author of Cobra directly for press purposes, forum registration problems, etc. then the email address to use is (in anti-spam form):
contact -AT- cobralang -DOT- com
You can also keep up-to-date on Cobra by checking the blog.