BioCASE provides access to European biological collections. Presently, we are working on a prototype that will be demoed at FOSS4G.
This functionality is based on uDIG 1.1 and not yet included in the DIVA-GIS available for download (which are based on the latest uDig 1.0.x stable release).
As soon as we make the transition to uDIG 1.1 - hopefully soon - we the BIOCASE connectivity will be available. Keep checking for updates.