Line of Sight communication

My company is growing and wants to open a small office in the next building. I have never employed line of sight communication and was wondering if any of you guys could give me suggestions. I figure we can buy two dishes, point them at each other and wire them up to the offices and let the data flow. Obviously I’m over simplifying. I’m looking for real world advice on vendors, competing technology, problems, and personal expereince.

Any help you can give on this subject would be appreciated.

Mike