Beaglebone was working fine both on serial and LAN.
I reimaged the SD drive from the Mac using xz -dkc Angstrom-Cloud9-IDE-GNOME-eglibc-ipk-v2012.05-beaglebone-2012.04.22.img.xz | sudo dd of=/dev/disk1.
That seemed fine.
When I plug in the card to the bone, it blinks maybe 2 seconds and then hangs; a LED remains lit or stays dark.
Did the board fry itself, or is it me?
Thanks for your help.