Dear All, Sorry for delay... Here are my few thoughts concerning future development of NA4 (from user's point of view). In the assumption NA4 is directed to help different communities to make use of EGEE infrastructure. This goal can be achieved in many different ways but a special attention should be, in my opinion, paid to the following: A) broaden the software available on the Grid B) simplify the work on the Grid C) spread the knowledge of Grid to wide community D) convince future potential users of the benefits of using Grid A) Most of the chemists use the same software in everyday's work. Therefore we have to provide all the software community needs. This must include commercial software as well. First step has been done but Gaussian alone isn't the only one needed. Others like Turbomole, Jaguar, or Cerius from Accelrys are also needed. Going one step forward we should think not only about software which produces some scientific results like this mentioned above but also about tools helping in later data processing. Also it often happens that some specific software is used not only by one community but by others too. Chemistry is not an exception. There is a lot of physicists, biologists, etc. using chemical software and vice versa (Gaussian, Turbomole, Charmm, Amber, Vien, or Accelrys Modeling Studio). Therefore we should make the software available for everyone. B) Simplifying the use of Grid by creating more "user friendly" interface is one of the key points in era where most of the people do not know how to read and write but just click on icons. For example a chemist experimentalist just waits for something like this. This people do not have time to spend on learning g-lite commands but need some common interface operated by mouse where an input file can be uploaded, program can be chosen and calculations started. There are existing applications providing this but they are not very popular and almost no one use it in production work. C) and D) Taking in to consideration chemistry again -- research is done mainly in small groups of scientists. What is common for them is the software they use. However there is no information flow. Above mentioned chemist experimentalist uses desk workstation for calculations and has no idea that the same calculations can be done much faster on the Grid. Some specific examples of Grid application may convince them about benefits they can archive by using Grid. See you soon, Mariusz