How to load data from BLS web

I would like to load the producer price indexes of BLS (Bureau of Labor
Statistics) into R:

For example, Commodity Data in
http://www.bls.gov/ppi/
There are many tables there.

I was wondering if you knew some R-package/function that can do this
or any basic idea onwriting functions to load data that can be loaded from
web. Thanks,

-james