Homepage http://sonata.berlios.de it seems that the homepage moved to http://sourceforge.net/projects/sonata.berlios/ maybe the source also (not tested yet) thanks
+ 17 Jun 2015; Ben de Groot <yngwin@gentoo.org> -sonata-1.6.2.1.ebuild, + metadata.xml, sonata-1.6.2.1-r1.ebuild: + Mark stable on amd64 and x86. Remove old. Update homepage and source location + (bug #551584). Fix indenting and whitespace.