Ask YC: How do I find a good intellectual property lawyer?

I'm currently employed at a startup as a developer and I'm working on a side project as well. These projects are in totally different areas and my employer has agreed to this in writing. However, I have signed various intellectual property documents and I want to make sure that I am covered. I'd like to get the documents I have reviewed and get a professional opinion. I'm trying to conserve every dollar so I can launch my own startup. Where could I find a good intellectual property lawyer and how much should I expect to spend?

thanks for your advice...