If anyone is waiting for the release of a WP8 version of Good for Enterprise, they have announced on their user forums that a beta program has commenced. If you are interested, you should contact them through your employer's Good account representative. I know a number of other people at my company who have expressed interest in a Windows Phone, but decided against it when I told them a Good app was not available for WP8. Hopefully, a final version will be released soon.