Modern life is impossible without Internet. We have got used to it very quickly. Just remember:3-5 years ago the majority of teachers were not so active in the Internet as they are today. As a result of this activity lots of teachers' sites have appeared in the net.
Let us take a closer look at the problem. On the one hand, experienced teachers usually have plenty of material to share with young collegues. They held dozens of so-called "open" lessons, prepared their school students to different language contests, olympiads, exams. They take part in different teachers'contests as well. All this may be or should be found on the teacher's site. It is nessesary to have your personal site for your qualification exams. One page of it is your portfolio.
On the other hand, as any deed, making your site demands great amount of time which our teachers are usually short of.
Still I believe this job deserves your attention.