Long time coming I know. Here it is (from Rich Burridge at Sun):
I'm pleased to announce the first open-source release of the Shared Data
Toolkit for Java Technology. This is the project previously called
the Java Shared Data Toolkit. The name has been changed as "Java" is a
registered trademark of Sun Microsystems Inc. It's still okay to call
it JSDT though, and the package names are the same.
This source code distribution is based on JSDT 2.1 which was last worked
on in December 1999, but never officially released.
Recently there has been an effort to cleanup the developer product pages
on java.sun.com. Projects that are no longer being supported are being
removed. JSDT was one of those projects. The options were to either EOL
(end-of-life) it, or release it as an open-source project.
The latter was chosen.
It's being hosted off java.net and being released under the LGPL licence.
There are two ways to get the JSDT 2.1 distribution.
1/ As a single zipped file of the source distribution. See the
"File Sharing" link on the left of the project home page.
The file you want is "jsdt-src-2.1.zip" under Top/releases.
2/ From the CVS repository. See: https://jsdt.dev.java.net/source/browse/jsdt/
for more details on how to do this.
Anybody interested in JSDT should become a member of java.net (if they
are not already one), and then join this project.