Well free access is very rare, but if you have an account with T-Mobile's service or some of the others then you might find it in some stores. On the Strip I don't like your chances, but it wouldn't hurt to call them up and ask. Most of the internet access in rooms I have seen is for the Web TV type operation, where you pay for the service through the TV. Some of the business-focused hotels might offer you a way to connect through a cable for a fee as well.