Latest update on 2010 Kerala SSLC results is that the same will most probably be declared on the 3rd of May 2010. This is as per the notice available on Kerala State Examination Results site http://keralaresults.nic.in.
One other site from where you can find the details is http://sslcexamkerala.gov.in/ - for SSLC 2010 Syllabus Results.
Also - see here too
The above site is for the Office Of the Commissioner For Government Examinations, Pareekshabhavan ,Thiruvananthapuram - also in charge of overseeing Secondary School Leaving Certificate Examinations of Kerala
So, keep checking for updates on Kerala 2010 results and Grading System.