Rajarshi Guha, David Wild and their collaborators have published a article that should be of great interest to several people on this list:
Chemical Data Mining of the NCI Human Tumor Cell Line Database
J. Chem. Inf. Model., ASAP Article 10.1021/ci700141x S1549-9596(70)00141-9
This is the same algorithm that Rajarshi has been running on our virtual libraries:
Congratulations Rajarshi and David!