Hot from the oven! A new book Koohang, A., Harman, K, & Britz, J. (2008). Knowledge Management: Research and Applications, Informing Science Press was just published. As a part of it, Dimovski, V., and Škerlavaj, M. (myself :-)) published a review chapter Organizational Learning as the Key Towards Improved Organizational Performance.
It provides a systematic overview of empirical literature on the impact of organizational learning on performance for the period 1990-2006. It also identify methods used and schools of thought (and measurement). The chapter also provides directions for future research that should take into consideration context, multi-levelness, and network perspective to organizational learning.