The final version of NetBeans 6.5 is out, you can grab it on http://www.netbeans.org/downloads/index.html 
It can be installed in your home directory on F9/10 without problems, it doesn’t taint your system in any way. You may wonder why I don’t use NetBeans 6.1 packaged in Fedora 10? I simply need the EE version with the GlassFish server.