A MacDirectory article (“Are PDAs Ready for Enterprise Prime Time?“) details the shift in focus of companies like Palm and Handspring to the largely untapped Enterprise market.

With the Palm operating system devices–including the Palms, Handspring Visors, TRGpros and new Sony PDAs–dominating the PDA market, the battleground between Palm and the Microsoft CE family of personal digital assistants is shifting to the enterprise market, which is largely unpenetrated.