ASP C# - Gift Registry

I seek to enhance a commercial WebSite, (ASP.Net C# 2.0 ) which currently has a product catalog, shopping cart and the ASP.NET Security, etc, etc. I want to add a variation to the existing 'shopping cart' to provide a 'gift' registry. The registry allows people to communicate 'desired' products etc. This is similar to a normal shopping cart allowing people to search by Username - effectively allowing them to bring up a friends / relatives 'gift registry' and selecting and buying a gift, etc.