Hi Rohit Suman,
Application server from
jboss and oracle are the two companies which do support ejb3.0 technology. I hope Weblogic 10.0 gonna give support of ejb3.0
Well, regarding the certification I would say its always good to have indepth knowledge of your domain in whichever you are working and certification do give genuine chance to prove us that. So, i wont think there is something wrong when you are going for ejb3.0 certification.
Cheers !!!
Sumit Malik