I use NetBeans. I like it. I encourage people to use it.
But I am not happy about their handling of "Open Project ..." Dialog. I have checked both NetBeans 5.5.1 RC1 and NetBeans 6.0 daily downloads.
The dialog looks like this (click to enlarge).
I have seen several developers double-click a project folder expecting it to just open the project and finding that it just opens the folder because...
OpenSearch is a nice specification and Firefox 2.0 has a support for it.
GlassFish is an open source project I work on. I wrote a simple GlassFish Issue Tracker Search Plugin for Firefox. Get it