Semantic Blogging and Bibliographies - Requirements has some useful notes for scientists sharing bibiographies via weblog communities. Of most interest are sections 2 and 3, and the illustrative scenario. You can already do the first part of this scenario with HubMed and Movable Type - each individual abstract page contains the metadata for use with a MT bookmarklet, including the TrackBack URL - but at the moment no metadata is passed to the weblog entry (so you don't get the semantic bit). The logging software is therefore the part that needs to be customised to accept postings of this kind - can Movable Type pass metadata through the posting API?
By the way, the newest release of Movable Type "changed all visible instances of blog to weblog in the system and in the documentation".