"This new generation of the Qt application development framework
contains many new features, improvements and extensions. It also
includes a significantly improved Qt Designer, and introduces Qt
Linguist, Qt Assistant and a new multi-platform build tool, qmake.
The Qt API is very unlikely to undergo any significant changes before
the final release is made, so we encourage you to begin enjoying Qt
3.0 right now." Check out Trolltech's announcement for more information.