Amongst the blogs affected:
Tim Ireland (back soon)
Bob Piper (back now)
Boris Johnson (back now)
The continuing saga is documented at Chicken Yoghurt.
Tim Ireland has a special blog set up (outside the UK!) for what’s happened and its consequences; Chris Applegate writes about a personal dilemma, as a Wikipedia admin monitoring Usmanov’s entry; Ministry of Truth has an interesting piece on uk libel law.
[ ETA a link to the timeline of events ]