Will give this a trial later when the other half gets home from work. She's in Canada and I'm in the UK so a fair real world test. I can't seem to get the imo.im to connect. Not tried to another account but to the Skype call test it just reports back as failed to connect to av server.
I heard someone mention imo.im Skype works better when both parties are logged into imo.im and not using the standalone client, feel free to experiment.