Doing any certification will add value.As you are certified by the Sun(Makers of java)it gives you a edge over those who have not.
Also imagine the attention you get on your resume if you add the sun logo to it.Invariably your resume will be noticed by all the companies and if you can prove your capabilities you invariably get through.
With 3 yrs of experience i think
you should also go for the
SCJD(Developer exam)which will further
boost your chances exponentially.
All the best to you.Do keep us updated.