The Indiana Supreme Court unanimously upheld that state's school voucher program. Summary, with link to full opinion here. I hope this influences a similar case that will likely be going to the Colorado State Supreme Court.
From the Indiana Supreme Court web site:
Briefly, the court rejected claims that the program violates provisions of the Indiana Constitution regarding education and religion. The court emphasized that Indiana's Constitution does not intend to prohibit religious institutions from receiving indirect government services, "such as fire and police protection, municipal water and sewage service, sidewalks and streets," but only prohibits expenditures directly benefiting such institutions. The direct beneficiaries of the voucher program are not the schools but those eligible families who are free to select which schools to attend.