Seconded on all things real estate. This is more of a legal/social problem than a technical one at this point. Websites like zillow.com make a real estate agents role largely obsolete, yet they still try to command a huge commission on every sale. Another poster above mentioned Title Insurance as well.

I suspect over the next 5-10 years we will see major changes in this industry. Huge savings to home buyers & sellers are available if the bureaucracy and traditions can be broken and replaced with a more consumer friendly system.