Intellectual property is things like patents, copyrights and trademarks. These lawyers will also be well-versed in the minutiae of contracts, litigation, business disputes, etc. I suggest that you get an intellectual property lawyer as opposed to a basic business lawyer because law revolving around the Internet is mostly intellectual property law. I think the best way to find a good lawyer, of any type, is through a satisfied customer. A referral will tell you far more about a lawyer than a dozen television ads.
Results are what count.
Far too many attorneys are hard to reach and don't return phone calls quickly. My rule of thumb is that a call should be returned within 24 hours. That is what you should insist upon. Of course you need to be conscious of fees when hiring a lawyer, but they are not the most important thing to be concerned about. While this is helps keep their fees down, you want to make sure that the lawyer you hire is the one doing the work when it counts.