As a reasonably tuned in Brit, i had no idea these protests were happening until reading about it after the fact. I think sopa-fatigue probably set in more with the relevant section english speaking population.
only found out about the saturday march to be held in dublin late on friday evening. currently on crutches so unable to attend unfortunately. fairly unorganised as far as i could tell from people who were there.
edit:
if i were to speculate i would say that most of geeks and nerds i know who care about these things don't use facebook and the dublin march seems to have been organised on facebook. i only found out when one person who linked their twitter and facebook accounts crossposted to twitter.
