freescale zigbee sdk
Hey
Try using CC2430DK to start off with. and there is a manual on CC2430 which explains the antenna and hardware design which I haven't got on me now, what I did was to read these manuals, then order CC2430DK, then I coded it and got it working, I also needed the chip to do the hardware part, but well my contract with the company only included the coding, but my contractor is also looking for CC2430.
If you need that manual, tell me and I'll find it for you.
Cheers