Hey Nick,
Was wondering if you ever got your dd-wrt to work with your dir-825. I currently have the same setup as you do. I have At&t modem plugged into D-Link dir-825 with WPA security. My Linksys router (with dd-wrt firmware v.24) is connected to dir-825 via Wireless. Then a desktop and a printer are plugged in to the linksys router. Currently, everything is working fine, except with occasion lost signal when my laptops are connected wireless, (still trying to figure out why).
I actually have another linksys router with the original linksys firmware. What I would want to do is actually connect that linkysys router to the modem, and use my dlink dir-825 router at my other house, which is one house down. But i'm not sure if that is possible because i don't know if dlink dir-825 can work as a wireless bridge mode? And the reason why i want to use dir-825 as a bridge is because it has a usb port in the back, this way i can connect a usb printer. Do you think that is possible?
Mike