I’ve added The Inter-faith Marriage Network web site to the blogroll. From their web site:

We’re in mixed marriages ourselves and we’ve listened to many other people in interfaith, intercultural and international relationships. We started the Interfaith Marriage Project because we realized that very little help or information was available for people like us, and couples and families often have to face the issues alone. As more and more people are forming relationships with partners of other faiths and cultures, it’s important for us to support one another.

We’re not here to tell you whether your relationship is right or wrong, or whether it can ‘work’. But we can help you ask the right questions and sometimes suggest things that have helped other couples. So you’ll find articles and links about everything from weddings and baby naming ceremonies to recipes and festivals, and don’t forget to look at our discussion forum.

We’re a network rather than a formal organization with members and officers, and we’re doing this in our spare time, so please be patient if we can’t respond to immediately.

It’s a U.K. based site, so some resources may not apply to U.S. and couples in other countries, but I thought it was really helpful overall and it also has a great links page.