Day one, I was able to connect to the router wirelessly. Two days later, my computer will connect but will never get the IP address. This seems to be a problem with all wireless connections (DWL-G520 and DWL-G650), wired connections will continue to work regardless. Unplugging the router, and plugging it back in, fixed the wireless problem. But you'll end up back to Day one.
Set a static ip address for each wireless MAC address on the router.
Set the static ip address on the wireless computer.
Will now get a static ip address and can connect, but a few days later, cannot connect period.
Solution: (weak signal)
Change channel, eg 11.