thanks for your question. Since this is the development tools sub-forum I will need to check back with the folks at Moblin.org what their plans are on supporting ZIGBee as part of the software stack.
I'll get back to you as soon as I found out.
currently I don't think there are any plans to include a ZigBee driver in the moblin.orgframework or put Intel resources directly into it.Since Moblin.org is however an open source project that anyone can contribute to you are welcome to help put the sw framework for ZigBee into place.
We doinclude WiMAx 802.16 support, but currently no 802.15.4 support is planned.
For the high-level differences between the two protocols please consulthttp://www.networkworld.com/techinsider/2004/0315techinsiderwiwi.html