Another (really) good reason to twitter in french (or blog C'est selon):
Twitter-like microblogging seems a nice granularity for following thoughts expressed in languages you donâ??t speak (…) I realised this: twitter posts in a foreign language are easier to follow than either full blog posts, email threads or realtime IM/IRC chat. Itâ??s a nice level of granularity that can bridge language communities a little, since someone with fading schoolkid or tourist knowledge of another language can use and reinforce it by reading microblogs in it.
I am following a few spanish tweeting peeps and I am enjoying it a lot too!