What's new in the Geostatistical Analyst toolbox
The new and improved functionality of Geostatistical Analyst in ArcGIS 10.1 includes a new empirical Bayesian kriging tool and a tool that aggregates areal interpolation layers to new polygons.
Empirical Bayesian Kriging is an interpolation method that accounts for the error in estimating the underlying semivariogram through repeated simulations.
Reaggregates the predictions of an Areal Interpolation layer to a new set of polygons.
Added the Append all fields from input features parameter. This parameter specifies whether all fields of the input feature class will be copied to the output feature class.