This plugin for the Screwturn wiki creates a page that contains the combined inventories of one or more people.
Download the plugin
here.
Install the plugin by uploadin the dll. Implement it by creating a page that contains the following text:
{BGGCombinedInventory:Name=BGGID,Name2=ID2,Name3=ID3}
Full source is included and is donated to the public domain by the author (me).
Example of this plugin in action
here. Information on more of my plugins
here. Information on the Screwturn wiki software
here.