I hear that abeni-1.0 is in the works, but in the meantime... 0.0.22 seems to work by simply renaming the 0.0.21 ebuild. Reproducible: Always Steps to Reproduce:
Nix that... abeni-0.0.22 seems to now require >=dev-python/wxpython-2.5, which currently seems to be masked.
1.0 will go in portage when wxGTK 2.6 stable is released, probably this month according to upstream