We've covered this in several ways over the years. I wrote a column of my thoughts about what works for bringing in dads. And our editorial folks covered it with a feature a year or so ago. There really are some basics that can make a big difference.
Are you seeing any progress in the dad area? In a silver lining I'd rather not face, I imagine the current economic climate may result in more dads with time to get involved with school. This is likely a good time to add some effort around attracting and welcoming dads.