The Adamo was Dell's answer to Apple's MacBook Air and featured a number of cutting-edge technologies - ultra-thin, ultra-portable, built-in SSD, built-in 3G. It was a cool bit of kit, but with a starting price of $2,000, it was just too much for a customers to swallow, especially given the less than stellar performance it offered.
CNET learned that the Adamo was being discontinued yesterday, but today a search of the Dell website for Adamo confirms that it's gone.
According to CNET, the Adamo brand may return later this year, falling under one of Dell's existing consumer brands (such as the Inspiron, XPS, or Alienware). We'll have to wait and see.
This isn't a victim of Apple's MacBook Air, more a victim of its own design and price.