There are several programs publicly viewable that list many areas and technologies that various government arms are interested in pursuing. One is the SBIR (Small Business Innovation and Research) program, another is NIST (National Institute of Standards and Technology), and others are published in various industry publications specifically aimed at the particular technologies or even specific arms of the government. Some of these are available through the SBA (Small Business Administration) and even some local Economic Development Councils. There are also requests by specific organizations like DARPA (Defense Advanced Research Projects Agency) or the particular arms of the military. Some of these can be accessed relatively easily through public channels, others require a bit more contact with the particular requesting organization. But to get any of these requirements, it does take a bit of digging and to get any of the contracts does invovle quite a bit of work in writing and assembling the proposals.