I've just published episode 15<http://radiantcms.org/blog/archives/2010/06/01/radiantcasts-episode-15-i18n-your-extensions/>of Radiantcasts - see how easy you can translate your extension to get it ready to Radiant 0.9.
(bliptv external link <http://blip.tv/file/3699071>) hope it helps, Cristi
