I just noticed that Knetworkmanager was recently submitted to portage (Aug 23rd).
It has support for NetworkManager's vpn plugins as well (OpenVPN, PPTP, and VPNC).
This is great news. Currently, I had been maintaining a live build on KnetworkManager in the Xeffects overlay, which really needed some love and attention. Now, with version 0.2 actually in portage, I can remove this from the overlay in favor of a static/stable build.