TI's partner Anaren has a great CC110L based boosterpack, which can be joined with a Stellaris LaunchPad. This would be a great way to start. You would still need to write the software, but at least it will get you the hardware easily. There's also an Anaren Zigbee BoosterPack that includes code examples for both MSP430 and Stellaris. That kit rocks, but Zigbee is probably a little too expensive for your needs.
http://www.ti.com/tool/430boost-cc110l
fixituntilitsbroken.blogspot.com
Yours is valuable, good news - although possibly "miscast" in response to near 7 year past - forum post...
May suggest new tag - "Fixitb4nextdecade" (just say'in)
After I posted it I realized that my forum page was sorted on date ascending, instead of descending. Oh well; hopefully someone googling for it will find it. :)