Then you gotta go up to coax or better... I used to have that running at my parents.. a coax network was a bit more irritating to set up, but the cable is a little sturdier and easy to use... more expensive tho. Wireless won\'t go that far unless you can put the base station right inbetween your houses, and that will be stretching the limits of it, especially in bad weather. You could also put a hub half-way, and run your cabling from there, but if that\'s outside, you would need some sort of shelter for the router/modem, etc.
When I had a coax network, it was mixed, so, basically two networks, that were connected at one computer which had two NICs one RJ45 and one Coax. You could do something like that...