WSNPlanet.com

Last year, I read an article by Aaron Ricadela in InformationWeek that provided a comprehensive review of different commercial applications of  WSN technology.  Eventhough most of the applications stated here are pilot implementations, it provides good use cases for WSN technology. It starts with how SAIC is testing WSN for border security then goes into more commercial applications like HP's pilot that uses WSN for inventory management and BP's and Intel's industrial automation examples.  The author makes an interesting point that the established tech companies including HP, Intel, and IBM are ceding the core mote technology development to startups like Dust, Crossbow and others since they see a bigger opportunity in providing installation services, mass producing chips, and developing software applications for wireless sensor nets. 

I recommend this article for anyone who is looking for WSN deployment ideas. Read the article here