Dear Ole,
If you would like to expand a ZigBee network, you could try with the MKW2x devices. They are recommended for new ZigBee designs. They could be programmed with the same Jlink that came with 1322x Kits and the applications available work with IAR as well. You may only need an adapter to 9-pin connection (Cortex M adapter), but a 19-pin adapter could also work. You may check it in Segger’s website.
Link: http://www.segger.com/jlink-adapters.html
For further details about the KW2x and the available development boards please visit www.freescale.com/kw2x. You will see there are a TWR form and a USB form boards. You may choose the one that fits your requirements the most. Both could be programmed using the Jlink (TWR board can also be programmed with a USB cable).
Regards,
AngelC