Slashdot:

Qt, the highly polished, well documented, modern GUI toolkit owned by Nokia will be available under the LGPL starting with version 4.5! … [Nokia] want to encourage and stimulate the use of Qt Everywhere. This is fantastic news for all commercial developers looking to create cross-platform applications …

Wikipedia:

Qt is most notably used in KDE, Opera, Google Earth, Skype, Qtopia, Adobe Photoshop Album, VirtualBox and OPIE.

Really good news for KDE project and fans.