Below  are the prices for online brokerage firms that trade options.  Prices reflect trades for internet accounts.  I will be posting more data for bulk trade discounts in the near future so please check back.

TD Ameritrade $9.99 + 0.75 cents per contract
http://www.TDAMERITRADE.com

Etrade
http://www.ETRADE.com
$9.99 + 0.75 cents per contract

Scottrade
http://www.scottrade.com/
$7 + $1.25 per contract

Fidelity
http://www.fidelity.com
$19.95 + 0.75 cents per contract