Digit-Life wrote a big article about the future of 64-bit extensions..
The key event of IDF Spring 2004 was the offcially announced support
of 64-bit extensions in the future Intel's IA32 desktop, server, and
mobile processors. Before the official announcement this technology
was codenamed Yamhill, but after that obtained the more sonorous name,
Clackamas Technology. Specialists however prefer calling it IA32E...