Many people have adopted the mobile phone in the last years. The mobile industry is now going to add the possibility to use data communication on the move. Many new technologies for this purpose will reach the market within a five year perspective. Example of technologies is GPRS, WAP, Bluetooth and MPS. Mobile data communication will make it possible to access the Internet from a mobile device. The last years a lot of PDAs have penetrated the market and the numbers of users are growing exponentially. All these industries are very hot today and they are merging to a mixed market with many different devices and services. This new market will probably be even hotter than any of these markets are today. When positioning technologies becomes widely available a new big market, location based services, is created. It is therefore important to quickly offer the market good services based on location. Today people nearly drown in all information that they get. Therefore services have to be adapted to the user and only provide the user with information he is interested in. Services have to be personalized and it will be an important factor for gaining shares in a market getting more and more global. If these factors are taken into consideration we will have a good starting point to build new valuable mobile services from.