as per kde wiki ( http://wiki.kde.org/tiki-index.php?page=Kopete+Jabber+Jingle ) jingle requires some more dependencies: net-libs/ortp =0.7.1 dev-libs/expat dev-libs/glib >=2.0 (already in for msn webcam) media-libs/speex >=1.1.6 dev-libs/ilbc-rfc3951 (optionally) still, even with those emerged, jingle refuses to build, arguing after configure that either jingle support has been disabled, or that a dependency is missing. jingle build was working with ebuild 0.12.2.
Thanks for reporting, seems like I got some rejects when I patched the ebuild, fixed now.