I have a couple WRT54Gs, sorry I don't have the version handy. They are at least a year and half old. Out of the box, they would not do wireless bridge, but with third-party firmware I managed to get it working. I was running Talisman from Sveasoft for that functionality. I had problems with losing connectivity and no longer needed the bridging after moving, so I switched back to the factory firmware.
YMMV.