Yahoo holding special event on Monday amid Tumblr acquisition rumours

Yahoo reportedly wants to buy Tumblr; is scared of Facebook

Tumblr arrives on Windows Phone with Live Tile integration

Tumblr pages being hacked with racist messages

Dell CEO's daughter in Twitter security scare

Tumblr moving to paid advertising

Mistyped tag leads to exposure of Tumblr DB passwords and API keys

Tumblr now back online after being offline 24 hours

Tumblr and 4chan war results in both going offline