Re: gcj ?

C'est expliqué dans l'annonce officielle: non ce n'est pas un fork.

http://article.gmane.org/gmane.comp.java.openjdk.distro-pack(...)
The next question that arises is "will you be submitting these changes to the OpenJDK process?" The answer is yes, we will, once the legal and technical issues are resolved.

Il y a aussi ceci dans la FAQ:
http://icedtea.classpath.org/wiki/FrequentlyAskedQuestions#W(...)
IcedTea is not a fork, and is not meant to be a permanent project - just a stopgap measure to create a fully FOSS OpenJDK.