Thanks to James Pratt, here's a list of case studies that might be pertinent to developers on the successful use of Windows Mobile for Line of Business (LOB) use.

Amway

Deployed mobile LOB application, productivity and error reduction. 

http://www.microsoft.com/casestudies/casestudy.aspx?casestudyid=201389

 

Lady of the Lake Medical Center

Deployed healthcare application to medical staff improving productivity and patient safety. 

http://www.microsoft.com/casestudies/casestudy.aspx?casestudyid=201377

 

University of Cincinnati

Used .NET CF application to make Windows Mobile phone more attractive to students.  Highlights richness of NET CF

http://www.microsoft.com/casestudies/casestudy.aspx?casestudyid=201333

 

Ball State University

Used a NET CF application to deliver education materials to nursing and medical students.  http://www.microsoft.com/casestudies/casestudy.aspx?casestudyid=201291

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