This is probably basic, but I haven't been able to figure it out or find an answer. My Lionized desktop shows my wife's employer-provided Snow Leopard laptop as a "shared" computer in my sidebar, but I am unable to access it. Can someone explain how I can connect with her laptop over wifi? Thanks in advance for explaining to me what likely is a very elementary and obvious process. Oops, after trying to connect with it, suddenly her laptop is no longer appearing in my sidebar.