I've been an earlier and strong endorser of Science Debate 2008, the movement to get the presidential candidates to debate science issues or to at least answer a set of the 14 top science questions.
Sen. Obama is the first to answer the 14 questions. Sen. McCain's answers may be forthcoming.
The 14 questions were developed from over 3,400 questions submitted by more than 38,000 signers of the ScienceDebate2008 initiative. The questionnaire is a joint effort led by ScienceDebate2008, with Scientists and Engineers for America, AAAS, the National Academies, the Council on Competitiveness, and several other organizations, together representing over 125 million voters.
Questions cover energy policy, water, climate change, education, innovation, scientific integrity, national security, economics in a science-driven global economy, health care, ocean health, biosecurity, space, stem cells, genetics, and research.