Internally Hosted Facebook?

[Dodgex1]

Joomla and community builder for free or Joomla and Jomsocial if you've got some pennies to spend. (Jomsocial is 50-100quid depending on version)

i'll 3rd Wordpress and Buddypress too especially for the lightweight load

[p858snake]

Posting this so I get subscribed to he thread.

[LosOjos]

Posting this so I get subscribed to he thread.

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[garoc]

Keep an eye on Kwercus:

Kwercus - the Secure Social Network for Schools - Home

...still in development I believe, but should provide us all with a reasonable/manageable social network platform for Schools....

[p858snake]

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Not on the mobile skin