Well I had a dsl hook up using a D-Link router and 3 people were using it.
Only time anyone had any trouble was when someone wanted to download any large files, like muzak files!
Had to go tell her knock it off and do the big file downloads during offtime.
She musta had over 100 files lined up for download.
She erased em all 2 weeks later when all those download law suite threats started.
Anyways, I don't trust wireless unless you cover your backside with security! Plenty of security. The CAN and WILL hack into an unsecured system from curbside.
I use wired stuff. Ya it's kinda old fashioned but a little more secure then wireless.