I have a Raspberry Pi setup as a wireless bridge for an XBox (i.e. Ethernet bridged to the wifi). Currently I can plug in a keyboard directly to reconfigure. Since the bridging works at the lowest two OSI layers, is there no way of accessing a web server on the Pi? Will it automatically be forwarding all traffic to the wifi card straight to the XBox?
No, it does not prevent doing that. The bridge itself is still on the network, and it can have an IP address of its own.