A mansion in London is set to sell for £117million ($230 mn) – making it the world’s costliest home.

The palatial residence, on a street dubbed Billionaires’ Row, is believed to have been bought by Britain’s richest man, steel tycoon Lakshmi Mittal.

He is believed to be close to exchanging contracts with owner Noam Gottesman, 47, a US-born financier.

The home in Kensington Palace Gardens, West London, Princess Diana’s former street, is being sold furnished and with an art collection.

Caviar for patients recovering from a blood test, psychoanalysis at 10,000 dollars per hour: nothing is too much for ailing billionaires at the Neo Vita clinic in Moscow’s swishest suburb.

For the clinic’s founder, Artyom Tolokonin, ensuring good health for the capital’s super-rich inhabitants is even better for his pocket book.

The 33-year-old psychoanalyst says that about a dozen residents of the Rublyovka neighbourhood — dubbed Moscow’s Beverly Hills — are paying for year-round treatments costing as much as a million dollars (636,000 euros) a time. [...]

Visitors pass a police post and surveillance cameras, before having their street shoes clad in clean overshoes, and entering a hallway gently illuminated by liquid-like jets of light.

Bill Gates is now only the third richest man with a net worth of $58 billion. Mexican telecom mogul, Carlos Slim Helú, trumps Gates by $2 billion.

Had Microsoft not made an unsolicited bid for Yahoo!, Gates would have kept the number one spot, which is now filled by Warren Buffet.

Naturally, the list had no shortage of Andrei’s, Sergei’s or Dimitri’s. However, it only places three Russian billionaires in the top 20.

Oleg Deripaska, Roman Abramovich, and Alexei Mordashov all share the title of “self-made” and each have made their fortune in aluminum.

With 10,000 private jets flying in the U.S., a few billionaires are signing up for something roomier – jumbo jets that can be outfitted as mobile mansions.

WSJ’s Wealth Report highlights on one such client, a Middle Eastern head of state, who shelled out $300 million on the notorious Airbus 380, an aircraft which is running way behind in its production schedule.

The unidentified buyer, will spend an extra $100 million to turn the craft into a more exclusive conveyance which Airbus eloquently calls “The Flying Palace”.

It is official that China has become the country with the second largest population of billionaires in the world, just behind the US.

Revealed by the World Entrepreneur magazine, a list of 2007′s top 500 Chinese magnates determined their combined wealth more than 587 billion dollars.

Though the list included many from Chinese mainland, Taiwan, Hong Kong and Macao, the Kwok brothers of Sun Hung Kai Properties in Hong Kong topped the list.