This is the last call for people to test drive and/or criticize the Bio::Ontology & Bio::OntologyIO re-design and implementation. The interfaces and modules to look at comprise of Bio::Ontology::OntologyI, Bio::Ontology::TermI, and Bio::OntologyIO. If you care about implementations (as Aaron says most people do rather than bothering with interfaces), check out Bio::Ontology::Ontology, Bio::Ontology::Term, and Bio::OntologyIO.