Java 64 bits (AMD64) poderá sair no release do java JRE 6u12.

Built Java Plug-in in 64-bit and support 64-bit VM on Windows/Linux/Solaris on AMD64.
xxxxx@xxxxx 2004-05-26
We will support Java Plugin/Java webstart on AMD64 arch on both Window and Linux platform.
Posted Date : 2008-10-13 19:32:26.0

64-bit support is deferred to a future release.
xxxxx@xxxxx 2005-06-01 21:40:27 GMT
This RFE has fianaly been comitted to the dolphin (JDK 1.7) release.
Posted Date : 2007-01-16 22:20:04.0

We have not only commit this RFE to JRE 7, but also JRE 6 update release.

The date for JRE 6 update release which has this 64bit JRE support will be early 2009.
Posted Date : 2008-04-09 16:57:04.0

Just an update......
The development/testing of the 64-bit plugin is underway and will be added to JDK6, sometime after the 6u11 release. Stay tuned!
Posted Date : 2008-10-10 21:56:24.0

We are targeting to support this feature in JRE 6u12, we will support Java Plugin/Java webstart on AMD64 arch on both Window and Linux platform.

On linux, we will support Java plugin only on Firefox 3 64bit browser, due to 64bit Firefox is not available on Solaris OS yet, we won't support 64bit Java plugin and Java webstart on Solaris platform at this moment.
Posted Date : 2008-10-13 19:31:42.0

http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4802695