Can somebody reply to this post.. this is an immediate requirement.. thanks!

I can't think of any at the moment that would fullfil that requirement however you may be able to get around that by sharing user logins between portals and then holding the repository on a separate portal or on the main parent portal.

In terms of a module this could be done using DNN Masters MPUS-X it is available on snow covered.

I haveimplemented a similar system with a main common repository... In that case I required that users have private areas that none of the other groups could access but also all of them have access to certain common resources. 

Whilst creating separate portals for each location may be simple is this level of separation neccesary you were saying you wanted users to be able to share the files they are uploading.

What about creating loactions areas that are separated by security role and the you only need to have a common repository and it is only one portal to maintain.

John