The 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 USB. Although the only sample application with an explicit CC2531 target build is the ZNP, two other sample apps that have an explicit CC2531 build target will be announced in this blog.
It is highly recommended to immediately migrate any existing Z-Stack application(s) to this 2.3.1 Z-Stack as it contains significant enhancements, bug fixes, and greatly increased robustness in very large network stress testing. Because no API's nor the the IAR compiler version were changed, the porting effort from Z-Stack 2.3.0 consists of nothing more than adding a new .c module to the IAR project as shown in the attached document. As always, this E2E community is the first place to come for questions and support on the Z-Stack 2.3.1 as well as all TI - LPRF products. Subscribe to this blog for important intra-release enhancements, additional sample applications, bug-fix patches, document updates and upcoming release announcements.
TI LPRF and Z-Stack - We make RF easy ... we connect the world.