Ok, Belgian, but I couldn't resist the title! My friend Gilles Bertrand has a new blog up at the wittily-named BeFlash.be where he (and his friend Vincent) will be blogging on Flash and RIA-related subjects in French. (Yet another reason for me to keep struggling to learn the language.)
If you do know French, another great site is Francis Bourre's Tweenpix -- although there doesn't seem to have been many updates this year (come on Francis, I have to keep Emilie busy translating your blog posts for me!)Vive Flash!