A month a so a go I wrote this item about java 6 on the mac. It was a beta release an I had some issues with it, but it was workable. Now the real deal is ready to be installed. You can download it form the following url.
http://www.apple.com/downloads/macosx/apple/application_updates/javaformacosx105update1.html
Running the update gives you two extra options in the java preferences pane. Now you can choose for java 6 (64 bit) but you can also choose for java 5 (64 bit).
I changed my settings to java 6 in the preference pane and now a java -version results in this:
java version "1.6.0_05" Java(TM) SE Runtime Environment (build 1.6.0_05-b13-120) Java HotSpot(TM) 64-Bit Server VM (build 1.6.0_05-b13-52, mixed mode)
You still have to do the trick with the softlink, beware of the order of arguments. In my previous article I made an error. So the correct thing to do would be:
sudo rm CurrentJDK sudo ln -s 1.6 CurrentJDK
Now you are al set to start using java 6 on the mac. Have fun.