We propose a framework, which blends Web 2.0 and Semantic Web technologies, to collect semantic descriptions of Web services and other software that enables their automatic discovery, invocation, composition, and interoperation. The pilot project, called GEO-SEED, aims to support Web services annotation and discovery for the geosciences. GEO-SEED provides both human and machine friendly interfaces represented by a structured wiki and a knowledge management system, respectively. While the former serves as the collaborative services annotation environment for geoscientists, the latter delivers acquired knowledge via RDF, OWL, OWL-S, SPARQL, and geosciences-based ontologies to powerful automated agents, such as scientific workflow management systems.