Just wanted to send a heads up that the 802.15.4 firmware version 1xE6, and the corresponding product manual for 1xE6, are now available from the support site.
Firmware:
http://www.digi.com/support/productdetl.jsp?pid=3257&osvid=0&s=268&tp=2
Documentation:
http://www.digi.com/support/productdetl.jsp?pid=3257&osvid=0&s=268&tp=3