Haskell Matrix Library

Hi, I have a simple matrix library (styled after MatLab's use of matrices), and was wondering if any of the standard libraries include matrix functionality. The library as stands is not suitable for general use - but it could be adapted. I guess the questions are: - is there already a matrix library in the standard libraries? - is anyone interested in a matrix library? - would people want a library like MatLab where matrices are instances of Num/Fractional/Floating and can be used in normal math equations... - operations like cos/sin/log can be applied to a matrix (and apply to each element like in MatLab)... What do people think? Keean