A ScienceBlogs I have a post on Muslim Creationism data up. The paper, On being religious : patterns of religious commitment in muslim societies, has lots of information. You can download it at the link. Here are the topline results for evolution:
It isn’t a representative sample:
About 45% of American Muslims exhibit some level of belief in evolution according to the Religious Landscape Survey. Also, the sample above only includes self-identified Muslims (so the non-Muslim minorities in Malaysia and Kazakhstan are not included).