Based on the trac roadmap, Gallery3 should be Final by April 1st 2009 (hoping that it is not an April Fools joke).
More info available at: http://apps.sourceforge.net/trac/gallery/roadmap [3]
Links:
[1] http://pulse.veltsos.com/category/it/blogging
[2] http://pulse.veltsos.com/category/it/software
[3] http://apps.sourceforge.net/trac/gallery/roadmap