I am having this exact problem. Everything was fine when we left for vacation on Wednesday, today it's not working. Nothing has changed on my network. My other devices are getting their IP addresses just fine, but I still checked my DHCP settings on my router and rebooted it to make sure it was cleared. But still, my Obi won't get an IP address - blinking green power light and the same "network status IP address not available" when I try to use it. I tried to follow the link in the FAQ for this problem, but it went to a broken link.
Let me add, I tried two network cables and finally moved the Obi to the router itself and plugged it directly into the switch, so it's not a network issue.