I've always wanted to do the Passover Seder. It has 2 levels of meaning for me. It connects us to the past and it is a very experiential education for the children.
I am happy to read about the White House Seder. I think it may be time to introduce this with slight variations to the church. Thankfully the wikipedia entry on Christian Seder is quite helpful on this. I will be checking out the links. Next year's Lent will be far more meaningful with this.