I Have two linksys WRT54g routers one at my house and one at a
business 100 feet away from my house. I have successfully created a
network with two line of sight antennas that is bridged from the home
router to the office router via a linksys WET54G wireless bridge. The
home network is on the network 10.1.100.0 with a subent mask of
255.255.255.0 and the office network is address 10.1.200.0 on subnet
mask 255.255.255.0. The bridge has the IP 10.1.100.226. Currently the
office router has a static WAN IP of 10.1.100.105 which is receives
from the home router. This method works fine to get the office
machines on the internet. However, I am not able to access network
resources from the office to the house or from the house to the
office, which is a main necessity! I can ping 10.1.100.1 from the
office which is the home router and i can ping internet IP's from the
office. I am not able to ping anything from home to the office
however.
Any help would be greatly appreciated! 
Thank You!
-Nick Yeager

First off what version of Firmware are you running on both and
secondly, the best bet is to turn on RIP on both of the routers, this
is located on the on the first page after the login prompt. I believe
the subtab is Advanced NAT or something to that extent. That should
fix that up.

Also you can do a manual route entry on this screen if you are up to the fun.