Some were because the launch of Wap was not done properly - for example, the difficulty of configuring the phones. Wap is good for things you do on the run such as price comparisons in stores. It's about the ability to invoke a business process from a remote device. A personal digital assistant with software is just a medium. It's basically a brand new market.
Users are logistics, supply chain management and so on.
The arrival of mobile devices within the enterprise will also shake up existing managerial relationships. IT managers face the risk of losing control just as they did when the PC first appeared, but this time there are additional security issues. But it is also vital that application developers understand which data is meant to be static and which dynamic. By its very nature, static data rarely changes so does not need to be updated very often, but even the smallest delay in sending dynamic data to a mobile device can cause problems. For example, a stock list being used by 50 sales staff must be kept as fresh as possible.