Hi,
I just saw from the sun site that there is no expiration date to your certification title.
Th FAQ says like this:
How long is my Sun certification title now valid?
As of August 1, 2003, all Sun certifications are now based on versions. There is no expiration date to your certification title. You may, however, be certified on a technology that is outdated if Sun releases a new exam associated with a new technology version. Keeping your certification current is highly recommended.
from
http://suned.sun.com/US/certification/faq/ Regards,
Jaya.