“Operation Payback” has had its website shut down. It’s currently only active through Twitter: http://twitter.com/Anon_Operation. Twitter is also hosting Wikileaks: http://twitter.com/wikileaks. I am confident that Twitter will also cave in shortly.
Facebook is also still up: http://www.facebook.com/wikileaks.
Wikileaks recommends using reddit to spread information: http://en.reddit.com/domain/wikileaks.org.
facebook just killed operation payback.
This is really far from over; it just may be just starting to heat up with the involvement of hackers taking down major financial institutions. This may even blow out of proportion and may lead to total internet blackout which is detrimental to world economy.