Connectionists: Function Approximation

[D Bisant]

A presenter at Supercomputing 2005 claimed that a number of classification
methods used in datamining, such as decision trees and nearest neighbor,
have been extended and perform well on function approximation applications.
Are any of you familiar with the application of these methods to function
approximation or interpolation?  

Regards,
David Bisant
The Laboratory for Physical Sciences