Yes, I know this is ultimately a case of the "genius of and", but the more I play with the Semantic Mediawiki extension the more I think this is going to be the most productive way forward. I've had numerous conversations with Vince Smith about this. Vince and colleagues at the NHM have been doing a lot of work on "Scratchpads" -- Drupal based webs sites that tend to be taxon-focussed.