In a previous blog entry I mentioned that the final release of JSR 105 (XML Digital Signature API) is available from http://jcp.org/aboutJava/communityprocess/final/jsr105/index.html. This will take you to a link to download JWSDP 1.6 which the JSR 105 API and implementation are bundled with.

However, I forgot to mention, that if you like, you can also try out JSR 105 by downloading a Mustang (Java SE 6) snapshot release. JSR 105 was delivered in the b39 snapshot of Mustang. JSR 105 is a component JSR in the Mustang umbrella JSR in the XML area.