Unbelievable, and in case you want to know. I'd like there!

Here's another link to the same apartment: http://finance.yahoo.com/real-estate/article/104984/Inside-the-World's-First-Billion-Dollar-Home

Following the not down-to-earth trend is this building in Chelsea that has an elevator and en-suite carparking (basically you drive your car into the elevator and park it on your 10th floor aparment):
http://www.streetsblog.org/2007/10/08/en-suite-parking-for-the-discerning-antisocial-urbanite/

There's a proposed one in Manhattans upper east which basically consists of 2 spires (like the Petronas Towers in Kuala Lumpur) and suspended between them are 10 free hanging 6 story townhouses. Oh, and these spires twist in mid air! It looks like a strand of DNA really, but i cant find an image.

I did find this, which is the curbed craziest design of 2007: http://curbed.com/archives/2007/12/26/curbed_awards_07_architecture_part_ii_top_10_craziest_architectural_renderings_of_the_year.php