Original von seb
I removed the other thread, for double posting.
I dont think I need to delete this one, however - it is available to be bought, but only if you want to use them for a commercial application. You can download the icons here for personal use:
http://www.kde-look.org/content/download.php?content=12057&id=1
Hmm, on kde-look the entry says they were GPL.
Did you find anything like that on the linked homepage (I didn't)?
BTW: If they were really GPL they'd not only be free for personal use but also for commercial use! Maybe only in software with a GPL-compatible license, not sure there (displaying an icon is IMHO different from linking against a library...). But the GPL *does not* discriminate against commercial software but only against closed-source licenses.