Hi guys,
Thanks for your continued contribution to my problem solving issue. I wanted to let you know that I bit the bullet and bought a stand alone modem, the SB6141, and should have that shortly. By eliminating one issue (the two wireless devices fighting for each other), I hope to have my Obi working again.
But while I'm waiting for that modem to arrive next week, I tried some of the suggestions you guys said below (but still unsuccessful).
1) I went into the Obi expert settings and changed my gateway address to 192.168.0.101.
2) The Obi is pulling a DNS server from my ISP automatically.
3) DHCP is "on" on my modem's WAN settings page.
4) NAT is "enabled" on my modem's LAN settings page.
5) My router's WAN and LAN MAC addresses are both in the DMZ of the modem.
6) The subnet mask for Modem, Router and Obi are all set to 255.255.255.0
7) The modem is plugged into one of the four LAN ports on the DLINK router.
DHCP is "off" on my router's WAN settings.
9) Firewalls are off on both the router and modem.
10) The OBI's MAC address is in the DMZ of the modem.
Still, I got nothing on the Obi, other than being able to see the device now on my "System Status" page (something that was not visible until I tried giqcass's suggestion of putting the Obi's gateway address as 192.168.0.101). Some progress, I think...