Netbeans 6.5 is available for download today.  There are many improvements to this version including JavaScript Debugging in FF and IE, as well as improvements to the JavaScript editor.
Improvements to Web Services, Java FX, Groovy & Grails, Ruby & Rails and loads more.

I’m downloading it as I write and am looking forward to trying it out.  This IDE only ever seems to get better and despite it not having as much on the JavaScript & non-Java Website front as Aptana I’m liking it more as a development tool simply because I can update it regularly without trouble.  Aptana is still plagued by the bug that kills the network when downloading updates :0(