Silva has been updated to version 0.9.2 (from 0.9.1.2). Mostly dependency version numbers have been bumped, but it seems some of the components have been broken out into separate packages. Multiple ebuilds follow.
Created attachment 13795 [details] net-zope/silva-0.9.2.ebuild
Created attachment 13796 [details] net-zope/silvametadata-0.6.ebuild
Created attachment 13797 [details] net-zope/proxyindex-1.1.ebuild
The last required update not in the portage tree is net-zope/formulator-1.4.2. Copy the ebuild for 1.4.1.
Created attachment 13799 [details] net-zope/annotations-0.4.1.ebuild
Created attachment 13800 [details] net-zope/silva-0.9.2.ebuild I overlooked net-zope/annotations
New versions: silvametadata-0.7 silva-0.9.2.2 Previously attached ebuilds should work, just bump version numbers.
3+ mo later, 0.9.2.4 is out, but nobody seems to care.
having plone in hands it's hard to figure out any case when i need silva