I use WIFI with mine. My router is about 15 feet away in the basement. I would love to go wired, but this is a rental house and as a result I don't feel like drilling holes, etc for ethernet cable. El-cheapo old D-Link wireless router.
I never have any hiccups or lag during game play, and I MIGHT experience one or two disco's a week.
Public Wi-Fi access points are going to be a different story though. You'll be sharing limited bandwidth with other users, and connection quality is not going to be consistent enough from one location to another. Yes, it's possible, but no it probably won't be reliable.