NetBeans IDE 6.0 is already avaliable to download! You can get it at:
http://download.netbeans.org/netbeans/6.0/final/
NetBeans supported technologies:
Ajax | C/C++ | Databases | Debugger | Desktop | Editor | GUI Builder | Java EE | Java ME | Java SE | Javascript | Mobile | Profiler | Refactor | REST | Rich Client Platform | Ruby | SOA | SOAP | UML | Web | WSDL | XML
Enjoy!