At TMRA 2010 a team of Czech researchers at the University of Economics in Prague presented their integration of Ontopia with the Joomla! CMS. Joomla is written in PHP, so they used the TMRAP web service to invoke tolog queries on the Ontopia server, and then present the results with XSLT. They have a UI for managing this, and even a framework for building user-friendly tolog query builders.
For more information, see the presentation page, which has the full paper and the slides. (Later, it will also have a video of the presentation.)
David Damen of Space Applications Services became an Ontopia committer today. David has been an active member of the Topic Maps community for a while, and right now he is working on Tropics, a web service interface to Ontopia, which he intends to add to the Ontopia sandbox in the near future. (He is on holiday at the moment, so it may take a while yet.)
We will return with more information on Tropics in the near future.