Does anyone know if pelletized corn gluten exists now for weed
control purposes?

It certainly does. I use a brand called "Weed Prevention Plus", made
by Concern. It's granular and is applied easily with a hand
spreader. You can get it online at
http://www.victorpest.com/lawncare/weedprevention.htm

Thanks!

I went ahead and checked through that whole list of licensees, and
determined that the following products are pelletized / granulated (or
their web site sucked).

* http://www.alternativeearthproducts....shieldplus.htm
* http://www.gardensalive.com/item_dis...er=8873&HOME=1
* http://www.victorpest.com/lawncare/weedprevention.htm
* http://americanatural.com/corglutweedc.html