International Mental Disability and Mental Trauma Care Improvement Act of 2008 - Amends the the Foreign Assistance Act of 1961 to authorize the President to award grants to nongovernmental organizations (including faith-based and community-based organizations) and individuals to: (1) provide training and technical expertise for foreign governments in the adoption of a national mental disability and mental trauma care framework; (2) initiate system reform of mental disability and mental trauma care; (3) provide training for disability and mental trauma care providers; or (4) provide direct, short-term emergency mental trauma assistance for the victims of humanitarian or political crises.