Other then Wi-Fi, or a big long cable, powerline networking is your only other choice. Ordering a well reviewed kit off the internet would be your best bet, and you could do it for $100. Basically it uses the powerlines in your home to route the internet over, so you just plug each adapter box into an existing outlet, and like that you have an ethernet jack upstiars. Just so you knwo what I'm talking about:

Something like: http://www.bestbuy.com/site/olspage.jsp?skuId=8258789&st=powerline+adpater&lp=7&type=product&cp=1&id=1170289325269

Or:

http://www.bestbuy.com/site/olspage.jsp?skuId=8780438&st=powerline+adpater&lp=1&type=product&cp=1&id=1204924953118

So I am going to help set up a friends xbox and here is the deal. he has a computer and xbox 360 in the basement. Upstairs he has a computer and it is hooked up directly to Road Runner cable internet.

I will get a wireless router and put that upstairs, and get a wireless PC card for the basement computer. Then, should I use internet connection sharing through the basement PC, and just hook up the xbox via ethernet. Or would there be any advantage to spending the extra $100 and get the wireless adapter for the 360? It would be much less cost involved in using the etehrnet cable from the basement PC over to the 360, and I dont see why it would work any different then using the 360 wireless adapter.

Next question is will the wireless G router, and PC card be fine? I mean, I am assuming it will be fast enough, because the official wireless adapter for the 360 only supports up to G, and not N. But the Circuit City guy tried to say that Wireless G was not fast enough for online gaming.

So if anyone could let me know if they are set up the way I am planning, or if it sounds ok, or any recommendations, I would appreciate it.

dont do the towel trick. It may work in the begining, but it hurts it severly in the long run.

The only one that really, really works, is the eraser fix. You can google it, I coudl help find some links if you want. You have to take your system all apart though, so you need to know how to do that, which I could help you with. Then you need a $2 eraser, and a proper size torx driver from sears, and some double sided sticky tape. You put properly cut rubber eraser pads on the graphic memory chips. The pads squeeze the chips onto the motherboard tighter, but jsut barely. When you turn it on, its still red ring, you let it run for 20 min, then restart and it works. The sauder heats up and since the chips are now squeezed in tighter, thesolderingreconnects.Mine has worked for about 2 months now since I did it. But DO NOT do it if you want to void your warranty, because if you have never opened the console, you can just send it in to MS and have them fix it. In the meantime if you have the money to float, or a credit card, just go buy a 360 from wal-mart, and return it when you get yours back from MS.