Competion in luxury property portals

New Jersey based Uniquehomes.com has been recently redesigned in an effort to provide affluent home buyers with "an unparalleled search experience," making it easy for them to find homes that meet their needs and to connect with the agents who represent them.
Uniquehomes.com is the online home for the 35 year old Unique Homes magazine. The website boasts just under 50,000 unique visitors per month and the hard copy magazine is distributed to 6000 "top luxury estate agents" as well as private jet facilities; country and yacht clubs; Forbes 400 offices; first class airport lounges and five star hotels and resorts mainly throughout the US.
Uniquehomes.com focuses mainly on the US and Caribbean markets, but also offers some representation in South America, with limited exposure in Europe and absolutely no listings from the UK, Japan or the rest of Asia.
Meanwhile, Unique Homes does have some on-line competition with luxuryhomes.com offering a map service as well as listings in about twice as many countries; and luxuryrealestate.com, which also offers more global representation. Primelocation.com seems to be expanding its prime international listings and of course the search engine enormo.com, while not focusing on luxury real estate as such does offer users over 4 million property listings globally.

For a complete list of overseas portals, it's a good idea to check out Global Edge.