said by dbmaven :

I know it is doable with the WRT54's - but IIRC you need 3rd party firmware. If you're inclined that way, it's a cheaper alternative.

The wireless bridges/gaming adapters are much easier. If you know what you're doing, even with a 'non-standard' network setup (e.g. I use 192.168.2.x in my private network) you can be up and running in 20 minutes or less.