Community Server is a white label social networking platform. It runs on Microsoft .NET / IIS technology. It powers the MySpace Forums and Microsoft's adCenter. Starts from $3k per year (small site), $50 per seat (min 200 seats) or $20k per server.
Amadeus offer a range of travel related services including white label travel search engine.
Outsourced travel sales. WWTE is the wholesale / white label brand name of Expedia.com
Freedom Travel are a white travel agency. They offer everything required to set up a travel agency, including equipment, payment processing, training, etc.
An article outlining social networks that target the rich. aSmallWorld is apparently the most popular, where only certain members can invite new members.