I do not beleive that SCJP 4 will be phased out soon. These are the exams they just discontinued:
Sun Certified Web Component Developer for the
Java 2 Platform, Enterprise Edition 1.3 (CX-310-080)
Sun Certified Developer for Sun ONE Application Server 6.0 (CX-310-540)
Sun Certified Data Management Engineer (emphasis on VERITAS Volume Manager (CX-310-101)
Sun Certified Data Management Engineer (emphasis on Solstice DiskSuite Software) (CX-310-102)
Sun Certified Backup and Recovery Engineer (emphasis on VERITAS NetBackup) (CX-310-151)
Sun Certified Backup and Recovery Engineer (emphasis on (CX-310-152) Solstice Backup)
Sun Certified Storage Architect (CX-310-130)
However the SCJP is just in a Beta State and will be available from Janaury 13 - February 13, 2005. It will cost $49 USD and it will comprise 166 questions. You will have 5 hours.
You can find out more at
http://suned.sun.com/US/certification/java/beta.html