abt3vt-Just a guess, but I think Izone may be testing this new offering in St Louis before launching it nationally. Note that the web address contains "St Louis" (http://www.izone.com/stlouis/index.cgi). The site also gives this disclaimer:
"Ameritrade offers various promotional pilot programs. Fees charged for the same service may differ by location. Pilot programs are subject to change at the discretion of Ameritrade. You will get 30 days notice of any fee change."
Assuming the commission schedule stays as currently advertised, this offering looks great for active traders. Saving $2 per trade will save me @ $1K/year, so I'm going to try it out.