I am writing an IMLS grant and was looking at Omeka as the repository for the digitization center I'm proposing. I'll be using quite a bit more metadata for the items than just DC (METS, MIX, PREMIS, TextMD, EXIF, etc), so I would have to add lots of new element sets and elements.
The question I have is if anyone is working on a generic xsd importer plugin. This would save many, many hours of manually creating arrays for import. If not, and assuming I get the grant, I would probably take that on (7 yrs PHP, about a year and half of ZF experience). I would have to write an XMP exporter anyway so I can cram all the metadata into a PDF/A file.
Of course, if it's already written by Oct of next year, I would be more than happy not to have to do it! :-)