The North American Orthodox-Catholic Theological Consultation endorses a common date for Easter:
In 2010, Eastern and Western Church Calendars coincided so that all Christians celebrated the Feast of the Resurrection on the same day. The dates for the Holy Day will coincide again in 2011, but will vary again after that. As we remember the joys of a common date this year, we look forward to the entire Christian world proclaiming the joy of the Resurrection together again next year. We are convinced that the time is at hand for a permanent resolution of this issue.
This would be a profoundly easy step to take. And to take it within the next few months, that would certainly be a welcome sign, especially to those discouraged by Roman footdragging under the last two pontificates.
The consultation suggests this scientific approach:
The key today to resolving the issue in accordance with the mandate of Nicaea is to determine the Equinox from the meridian of Jerusalem (Longitude 35° 13’47.1) using the most accurate scientific instruments and astronomical data available. This will resolve the conflict in our liturgical observance by aligning existing Church calendars to the Nicene formula– not just the calendar from one set of Churches, but from both Eastern and Western traditions.