I did this:
And it half works. I can ping the client bridged router from my wired network and I can get to the ddwrt admin page on the router via the wireless bridge it made to my main wireless router.
The only problem is, I can't get any of my wireless devices to find the client bridge side of the wireless signal, so it serves no practical purpose.
Maybe I understood it wrong, but I thought it basically functions as an extension of the main wireless router by bridging (via wireless) but still letting other clients (eg. my laptop) still connect to it wirelessly. effectively increasing the physical range of my wireless network. Is this not what it's for?