It has been confirmed that the CBSE results for class 12th for the Chennai, Ajmer and Panchkula regions will be announced on 21st May 2008 and for Delhi, Guwahati and Allahabad regions will be announced on 23th May 2008 at eight in the morning.

You can check the results here- http://cbseresults.nic.in/

Those who want to get the results as soon as it is released can register here and will receive the results by Email  http://resultsbymail.nic.in/cbseresults/Mailreg.asp

So all the best to all and keep looking for more info.