Maven 3 is in Fedora for some time but no package was using it to build.
Things are changing we have the very first package using it to build in Fedora approved. Thus we consider it ready for general usage.
All you need to do is change
mvn-local and switching parameters having maven2 in their names to just maven e.g. -Dmaven2.jpp.depmap.file becomes -Dmaven.jpp.depmap.file.
We are looking for your bug reports or even better success stories. Let's make Fedora 15 rock for Maven users and let's hope that we will be able to kill Maven 2.x not later than Fedora 16.