http://e2e.ti.com/support/low_power_rf/b/lprfblog/archive/2010/09/09/z-stack-pro-2007-2-3-1.aspxThe TI protocol stack implementing the ZigBee PRO/2007 specification and the Smart Energy Feature Set is available for download now: http://focus.ti.com/docs/toolsw/folders/print/z-stack.html Note that the ZStack-CC2530 does support the CC2531 USBen-US6.x Production