If your system admins haven't been converted to the idea of using Google Apps for your email and to provide customised start pages, share calendars, collaborate on docs, publish web pages etc. then you might like this:
http://www.google.com/apps/edu/index.html
It allows your students to share documents, calendars, talk and a start page - all they need to do is register with the same email domain, eg student1@school.com and student2@school.com will be connected by virtue of the connected email address.
Very easy, and a good way to taste what
http://google.com/a/edu/ has to offer - for free, and without adverts.
We've been using Google apps for our 900 students & staff for two months now.. and it is sweeeet. Eg.
http://start.gcus.net makes a great customisable home page for students, some even set it as their homepage on their home PCs. Email is amazing, fully featured and again advert free - making it better than the regular GMail!
And welcome to the new members on ICTnet - whose been talking about us :)
Ps. - why won't Ning auto create my hyperlinks? - Facebook and Google make a great job of doing it!
And also great for teachers who want to collborate as well. One slight problem is that sites like Ning and GoogleDocs are blocked in some schools:
Site Accessible
My Space 7.70%
Bebo 10.10%
Flickr 27.80%
YouTube 15.90%
Facebook 8.00%
Ning 25.00%
Google Docs 57.70%
Blogger 39.50%
So Ning is only accessible in 25% of schools in the survey (over 100 schools). Generally this is an issue for web 2.0 apps as there appear a lot of IT Techs who say no as a matter of course to any request. Whilst a lot of the blocking is at country or RBC level, a substantial proportion is done by the schools themselves.
Mike