For the op, yes, I believe Echotrade clears through Merrill/BofA.
Thanks for heads up on Vtrader, good to know there's a CBOE firm in the Bay Area. And to answer your question, according to their site:
"Established in 2004, VTrader Pro is a SEC registered broker-dealer regulated by the CBOE. Our Group trades proprietary accounts through our clearing relationships with Bank of America Merrill Lynch Professional Clearing and Penson Financial Services."