转帖一个有关Qt的信，绝对天大的好消息，Qt 4.5版本会以LGPL发布。这样大家可以放心用于商业用途，而无需关心版权的问题了。Nokia还是财大气粗呀。

Dear Qt User:
Nokia is pleased to announce that with the release of Qt 4.5 you will
be able to use Qt under the Lesser General Public License (LGPL)
version 2.1 terms. When released in March 2009, Qt will be made
available under three licensing options: Commercial, LGPL and GPL.
Prior versions of Qt are not impacted by this announcement.
Nokia is committed to Qt and its continued development. By offering Qt
under LGPL version 2.1 license terms alongside today’s licensing
options Nokia hopes to:
– facilitate wider adoption of Qt across industries, desktop, web and
embedded platforms.
– establish Qt as a de facto standard for application development.
– receive more valuable feedback and increased user contributions to
ensure that Qt remains the best-in-class, cross-platform framework.
– extend Nokia’s existing platform commitment to the open source
community.
By offering a cost-free LGPL license as well as commercial and GPL
licenses to Qt, you can choose the license model that best fits your
development requirements.
Irrespective of which license model you choose:
– Qt Software is committed to continuing to provide our customers with
the same level of professional support, services and regular releases
you have come to expect of Qt Software.
– We will continue to actively develop Qt, and with a greater degree
of cooperation with the community through a new contribution model, we
hope to make Qt even more valuable to our users.
For more information on the introduction of the LGPL license and what
this means for you, please consult the Frequently Asked Questions
section on www.qtsoftware.com.
Best regards
Tom Miller
Director of Sales
Nokia, Qt Software