http://www.qtsoftware.com/about/licensing/a-letter-to-our-customers
http://www.qtsoftware.com/about/news/lgpl-license-option-added-to-qt
It would be a good move if KDE decided to adopt the LGPL version of Qt 4.5 instead of the GPL one. That way people would be able to develop both closed and open-source software for Qt without having to buy Qt licenses. I think I will still renew my license, because QtSoftware support is just oh-so-kick ass!