The Center for History and New Media at George Mason University has released Omeka 1.0.
Here's an excerpt from the announcement:
This production-grade release marks the completion of Omeka’s basic requirement set. Maintaining our commitment to serious web publishing for scholarship and cultural heritage, Omeka 1.0 incorporates unqualified Dublin Core metadata for organizing and displaying collections; support for extensible element sets; robust, flexible theme and plugin APIs; and plugins for Zotero compatibility, static page creation, and building sophisticated online exhibitions.