Frenchteacher and Webosoof
twitter.com/jnsgrs (created for MOOC purposes)
twitter.com/jansegers (general)
but also
fanfou.com/jansegers
weibo.com/jansegers
squiper.com/jansegers
meemi.com/jansegers
identi.ca/jansegers
plurk.com/jansegers
app.net/jansegers
