Copy of GROUP functionality in Linkedin.com

We have a networking site and we need to add a GROUP module/functionality that is very similar or a replica of what [login to view URL] has for its group functionality.? After coding/module is done we need it implemented into our site.? ? Everything needs to be asp.net 2.0? -? C#, ajax, and? MSSQL database. ? ? ## Deliverables Once again, we have a networking site and we need to add a GROUP module/functionality that is very similar or a replica of what [login to view URL] has for its group functionality.? That means our current members will be able to create groups, join groups, search groups, participate in groups, manager groups and so on.? Members will also have the ability to invite their existing contacts (contacts that exist in their address book) to join the group OR they will be able to invite people on the outside who by using our invitation form that is already functional on our site. After the coding/module is done we need it implemented into our site.? ? Everything needs to be asp.net 2.0? -? C#, ajax, and? MSSQL database.? ? ? Copying or having a similar design is a big plus.