Josh writes: “”Elliot Silver writes about how data from parked domains can reveal important information to the current domain owner.  Potentially useful if the current owner is planning to develop or to a future buyer that might develop on that domain.”"

http://www.elliotsblog.com/index.php/2007/10/26/direct-marketing-via-parked-domain-name/

***FS***  There’s a relevant dynamic here for keyword marketing or arbitrage as well.. The best type-in domains often make the best arb sites as well.  No matter which angle you approach from, the map to success online typically begins with a good keyword name.