We've started work building a prototype of our semantic portal demonstrator as outlined in [1]. For the first prototype we've got some data from a older UK directory of environment organizations and are developing an appropriate set of ontologies form converting it to RDF.
Like all ontology problems, the task of defining an appropriate ontology for environment organizations just explodes in scale and complexity as soon as you touch it. First we just wanted a broad organizational type but soon found that it would be useful to have a more precise ontology for legal status. A few conversations with a lawyer led to a useable small ontology for legal status, for the UK at leas,t it its already too complex to expect many users to want to work with. So we had to go back to a simplified "colloquial" ontology for organizational type with separate links to a more detailed legal status thesaurus. This approach of having a coarse grained ontology which controls the main information structure, with links to more refined thesaurus terms to fill in the details, seems like a useful design pattern and we hope to repeat it for other facets such as organizational activity.
On the hacking front we are putting together a data entry tool based on a customization of our semantic blogging demonstrator - on the grounds that blogging should be a good way to capture data. For the viewing side we building an aggregator which can merge various semantic blogs and other RDF sources into one repository and provide a faceted browse interface over the repository. We've got an early version of the faceted browse interface going, inspired by projects like Flamenco [2]. It seems a very nice way to browse highly structured RDF data sets and might be worth packaging up as a separate open source tool.
[1] http://www.w3.org/2001/sw/Europe/reports/requirements_demo_2/index.html
[2] http://bailando.sims.berkeley.edu/flamenco.html