This is what Sun has to say about their Certification [stolen right out of a Sun flier]:

Sun Certification isn't just about technology

It's about your career. It's about respect, effectiveness and increased opportunities. When you take advantage of Sun Certification in Java^TM and the Solaris Operating Environment, you can:

VALIDATE YOUR SKILLS

INCREASE YOUR MARKET VALUE

REALIZE NEW CAREER OPPORTUNITIES

ESTABLISH INSTANT CREDIBILITY

As technology evolves, so does Sun Certification. To find out more about Sun's recent advances visit:

Sun Educational Services