Hilzoy points to and comments upon a series of posts (1, 2, 3, 4) at SCOTUSBlog on Sotomayor's record. The blog also addresses the much discussed Ricci case:
Judge Sotomayor’s detractors will have a hard time making the case that her work is anything but thorough and thoughtful, based on a reading of the bulk of her opinions. This may, however, make the Supreme Court’s decision in Ricci all the more important in the coming debate. The Court’s review of the decision will provide those involved in the public debate with a seemingly objective measure of the quality of her work.