After Inkscape, OpenOffice.org (Novell edition, ooo-build), and Abiword, Karbon in the next KOffice 2.x joins the array of open-source software which is, by using libwpg, able to import clip-arts in WordPerfect Graphics (WPG) formats. Since any Karbon drawings can be embedded in a document, of course this means you can attach and insert WPG clip-arts in a text document, a spreadsheet, or a presentation.
(There is still a rendering problem in Karbon as seen in the comparison screenshot. Hopefully will be fixed as it is approaching the release).