Hi,
for those of you interested in numerical analysis, I've added Gambit Scheme interfaces to high-performance BLAS and FFTW3 libraries in the Dumping Grounds: http://dynamo.iro.umontreal.ca/~gambit/wiki/index.php/Dumping_Grounds
The BLAS interface is a complete wrapper for level 1, 2 and 3 BLAS linear algebra routines.
The FFTW3 interface is a wrapper for some FFTW3 functions (float or double, real or complex, uni or multi-dimensional FFT functions).
Cheers,
-- Pierre-Alexandre