The appetite of venture capitalists for investing in new technologies is rebounding: in 2004, venture capital financing in the United States was up 8 percent from the year before, following three years of decline. With the success of Google's initial public offering (IPO) in August 2004, technology again excited the public imagination. Indeed, the window on IPOs opened wide in 2004, with 233 companies going public on U.S. stock exchanges and raising $43 billion, up from 79 companies and $16 billion in 2003. Biotechnology IPOs were particularly successful, raising $2.5 billion, the most since the $8.7 billion raised in 2000. So why are many of those involved in the funding of emerging technologies so worried?

According to some experts, the kind of basic research necessary to create tomorrow's technologies is under siege -- or at the very least, suffering from neglect. Venture capitalists never entirely stopped investing in companies with technologies just emerging from the lab. But after several years in which high-risk investments were unpopular, many startups developing innovative technologies (especially in such areas as nanotechnology and new genomic approaches to medicine) are starving for capital. Even more worrisome, the federal government's preoccupation with funding homeland security and national defense, and its resulting cutbacks in support for basic research in other areas, has left many wondering where the funding for research on new core technologies will come from.