At the moment, there isn't a list of Certified Developers available online
. Till the end of 2010, the number of certified developers will be displayed in profiles of Kentico Solution Partners:http://www.kentico.com/Partners/Solution-Partners.aspx
(you will be able to see whether a specific partner has a certified developer (and how many).
If you need any specific information or you are looking for a certified developer please drop me an email to email@example.com.