Have you seen
www.rangeroamer.com? Is this Travelsim repacked and tailored for US market?
Also offered on Ebay as:
http://cgi.ebay.com/Global-Roaming-SIM-car...1QQcmdZViewItem
Free incoming in 36 countries. No setup fee outbound. High US rates. Free inbound SMS, but can't find the outbound rates in the PDF or on the site.
Also, new seller offering UM cards on Ebay today.
Stan
Phones: DASH V3 (3)
Service: US T-MO post paid (2) - US T-MO prepaid (2) - UM+ - TravelSIM DE SIMYO - DE SUNSIM T-Mobile DE
Calling Cards: Onesuite Enjoyprepaid AT&T MCI Mobivox