The latest issue of IEEE Computing in Science and Engineering is a special issue on reproducible research. It features several articles on tools and approaches for reproducible research.
I also contributed a paper “Code Sharing Is Associated with Research Impact in Image Processing“, where I show that there is a relation between making code available online for your paper and the paper’s number of citations. For academics, I believe this is one of the most important motivations for making code available online.
Have fun reading the entire issue!