rob var/cov + LAD regression

1. Is there a function to have a  "jackknifed corrected  var/cov  
estimate" (as described in MacKinnon and White 1985) in a standard  
OLS regression?

package:  sandwich

2. Does R possess a LAD (Least Absolute Deviation) regression  
function?

package:  quantreg

url:    www.econ.uiuc.edu/~roger            Roger Koenker
email    rkoenker at uiuc.edu            Department of Economics
vox:     217-333-4558                University of Illinois
fax:       217-244-6678                Champaign, IL 61820