[Lapack] fast condition number of nonsquare matrix

[Dima Sorkin]

Hi.
 I want to get a fast approximation for a condition number
of a general non square matrix. Or at least it's smaller
singular value. SVD is too heavy for me.

1) Is there faster methods via lapack, than SVD ?
2) If I can provide a pretty good initial guess for cond or
   singular value - can I gain from it ?

Thank you,
 Regards,
 Dima.