The currently latest version in portage, 2.2.2.0, isn't able to fetch the binary file any more. Please update the ebuild and consider adding a live ebuild, since google seems to changed the naming scheme by removing the version numbers from the files, e.g. it is now "google-talkplugin_current_amd64.deb". Reproducible: Always
Latest in portage is 2.3.2.0, so I assume that the version bump request is now obsolete. I'll let the maintainer evaluate the second half of this bug (live ebuild request).
I am not really in favor of adding a live ebuild, mostly because dependencies are constantly changing, but as this is the third request I will give it a try.
I added google-talkplugin-9999 to cj-overlay for testing.
I added it to the tree (masked)