I forgot to mention there is one more ontology community-based Wiki/Forum that has been around for quite some time and does reference a lot of info. That is the Ontolog Wiki started quite a while ago by Peter Yim, now maintained by Peter, Kurt Conrad and Leo Oberst (the latter of MITRE). I find this Wiki quite dense, making it both hard to see the forest for the trees and difficult to find a particular set of trees.

Still - there is a wealth of information here, and an ongoing set of conference calls associate with this forum.

There is also the OntoWorld Wiki (http://ontoworld.org/wiki/Main_Page) associated with the very important annual International Semantic Web Conference (ISWC).

In both cases, these sites both include a breath of coverage that is in no way limited to the biomedical domain, while also tending to be focussed specifically on the project undertaken by the participants of those forums, as opposed to also casting an eye outward to keep track of all the other relevant projects and tools.

Cheers,
Bill