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For the future release 7.2 of NetBeans, today the Community Acceptance Testing (NetCAT) starts. This is your opportunity to participate on development of this IDE: Use an early version right now and report bug to the NetBeans team or submit suggestions for imnprovement.
If you like to paricipate, subscribe the mailinglist  and register yourself at NetCAT 7.2 wiki .
In my booklist  you’ll find books about NetBeans.