Hi Nelson,
Sun started using two new assignments in April this year (Contractors and Hotel), so it is unlikely that there will be any new updates for a while.
Rumors are that there will be an update to SCWCD early next year, and an update to
SCEA soon after the official release of
J2EE 1.4. But I haven't heard of any plans for updates to
SCJD (yet).
But what do you mean "buy a review"?
Regards, Andrew