It's fun and interesting, so students are motivated to use English. Students learn to think from the point of view of foreign audiences.
Students can easily save their pages on floppy disk and work outside of the classroom.
To get a idea of the range of possibilities, it's useful to look at some of the projects that have already been carried out in language classes. The Daily Life in Japan pages made by my 1996 Intermediate English class at Waseda use photographs and short captions to show scenes of daily life in Japan. These pages are aimed at a general audience of people outside of Japan. The Famous Personages in Japan site at Kyoto Sangyo University is also aimed at a general foriegn audience. It gives short reports on famous Japanese people, ranging from musicians to sports stars to politicians.