logP, clusters, similarity reviews???



Dear CCLs,
 as a freshman in the field, I would like to know if there are any recent
 reviews on the following topics:
 - calculation of logP (lipophilicity) of organic molecules
 - recent advances in cluster analysis(especially for HUGE databases),
   based upon molecular similarity,
 - recent developments of measures of molecular similarity.
 ThanX
 Michael E. Beck